185100040 has 32 divisors (see below), whose sum is σ = 430839000. Its totient is φ = 71486464.

The previous prime is 185100037. The next prime is 185100061. The reversal of 185100040 is 40001581.

It can be written as a sum of positive squares in 4 ways, for example, as 169052004 + 16048036 = 13002^2 + 4006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 185099990 and 185100017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78625 + ... + 80944.

Almost surely, 2^185100040 is an apocalyptic number.

185100040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185100040 is an abundant number, since it is smaller than the sum of its proper divisors (245738960).

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

185100040 is a wasteful number, since it uses less digits than its factorization.

185100040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159609 (or 159605 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 185100040 is about 13605.1475552454. The cubic root of 185100040 is about 569.9046111024.

The spelling of 185100040 in words is "one hundred eighty-five million, one hundred thousand, forty".