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2139376148 = 227135877407
BaseRepresentation
bin111111110000100…
…0100101000010100
312112002121120100122
41333201010220110
513340140014043
6552142131112
7104005253150
oct17741045024
95462546318
102139376148
119a8692a68
124b8580a98
132812c6760
141641ba060
15c7c44368
hex7f844a14

2139376148 has 24 divisors (see below), whose sum is σ = 4607887872. Its totient is φ = 846346464.

The previous prime is 2139376147. The next prime is 2139376157. The reversal of 2139376148 is 8416739312.

It is a junction number, because it is equal to n+sod(n) for n = 2139376099 and 2139376108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139376147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938340 + ... + 2939067.

It is an arithmetic number, because the mean of its divisors is an integer number (191995328).

Almost surely, 22139376148 is an apocalyptic number.

2139376148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2139376148 is an abundant number, since it is smaller than the sum of its proper divisors (2468511724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139376148 is a wasteful number, since it uses less digits than its factorization.

2139376148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5877431 (or 5877429 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 2139376148 is about 46253.3906649015. The cubic root of 2139376148 is about 1288.5335072668.

The spelling of 2139376148 in words is "two billion, one hundred thirty-nine million, three hundred seventy-six thousand, one hundred forty-eight".

Divisors: 1 2 4 7 13 14 26 28 52 91 182 364 5877407 11754814 23509628 41141849 76406291 82283698 152812582 164567396 305625164 534844037 1069688074 2139376148