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23100380 = 2251155019
BaseRepresentation
bin101100000011…
…1101111011100
31121110121202122
41120013233130
521403203010
62143042112
7400231022
oct130075734
947417678
1023100380
1112048726
1278a0338
134a2a684
1430d4712
152064855
hex1607bdc

23100380 has 12 divisors (see below), whose sum is σ = 48510840. Its totient is φ = 9240144.

The previous prime is 23100377. The next prime is 23100397. The reversal of 23100380 is 8300132.

It is a super-2 number, since 2×231003802 = 1067255112288800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577490 + ... + 577529.

It is an arithmetic number, because the mean of its divisors is an integer number (4042570).

Almost surely, 223100380 is an apocalyptic number.

23100380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23100380 is an abundant number, since it is smaller than the sum of its proper divisors (25410460).

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

23100380 is a wasteful number, since it uses less digits than its factorization.

23100380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155028 (or 1155026 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 23100380 is about 4806.2854680096. The cubic root of 23100380 is about 284.7998183888.

The spelling of 23100380 in words is "twenty-three million, one hundred thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 1155019 2310038 4620076 5775095 11550190 23100380