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145779990 = 23528117293
BaseRepresentation
bin10001011000001…
…10110100010110
3101011022101112220
420230012310112
5244304424430
622244323210
73420052356
oct1054066426
9334271486
10145779990
117531a734
12409a3506
1324282165
141550ab66
15cbe9110
hex8b06d16

145779990 has 32 divisors (see below), whose sum is σ = 351137376. Its totient is φ = 38734080.

The previous prime is 145779983. The next prime is 145780001. The reversal of 145779990 is 99977541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217 + ... + 17076.

It is an arithmetic number, because the mean of its divisors is an integer number (10973043).

Almost surely, 2145779990 is an apocalyptic number.

145779990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145779990 is an abundant number, since it is smaller than the sum of its proper divisors (205357386).

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

145779990 is a wasteful number, since it uses less digits than its factorization.

145779990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17584.

The product of its (nonzero) digits is 714420, while the sum is 51.

The square root of 145779990 is about 12073.9384626558. The cubic root of 145779990 is about 526.2991137541.

The spelling of 145779990 in words is "one hundred forty-five million, seven hundred seventy-nine thousand, nine hundred ninety".

Divisors: 1 2 3 5 6 10 15 30 281 562 843 1405 1686 2810 4215 8430 17293 34586 51879 86465 103758 172930 259395 518790 4859333 9718666 14577999 24296665 29155998 48593330 72889995 145779990