185000438490 has 64 divisors (see below), whose sum is σ = 507485018880. Its totient is φ = 42281210880.

The previous prime is 185000438479. The next prime is 185000438501. The reversal of 185000438490 is 94834000581.

185000438490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (185000438479) and next prime (185000438501).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2117880 + ... + 2203500.

It is an arithmetic number, because the mean of its divisors is an integer number (7929453420).

Almost surely, 2^185000438490 is an apocalyptic number.

185000438490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

185000438490 is an abundant number, since it is smaller than the sum of its proper divisors (322484580390).

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

185000438490 is a wasteful number, since it uses less digits than its factorization.

185000438490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95927.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 185000438490 in words is "one hundred eighty-five billion, four hundred thirty-eight thousand, four hundred ninety".