185047990 has 16 divisors (see below), whose sum is σ = 343831680. Its totient is φ = 71631360.

The previous prime is 185047987. The next prime is 185047997. The reversal of 185047990 is 99740581.

It is a super-3 number, since 3×185047990³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185047997) 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, 298155 + ... + 298774.

It is an arithmetic number, because the mean of its divisors is an integer number (21489480).

Almost surely, 2^185047990 is an apocalyptic number.

185047990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

185047990 is a deficient number, since it is larger than the sum of its proper divisors (158783690).

185047990 is a wasteful number, since it uses less digits than its factorization.

185047990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596967.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 185047990 is about 13603.2345418286. The cubic root of 185047990 is about 569.8511871703.

The spelling of 185047990 in words is "one hundred eighty-five million, forty-seven thousand, nine hundred ninety".