185134690 has 32 divisors (see below), whose sum is σ = 360748080. Its totient is φ = 68001024.

The previous prime is 185134681. The next prime is 185134693. The reversal of 185134690 is 96431581.

It can be written as a sum of positive squares in 8 ways, for example, as 162027441 + 23107249 = 12729^2 + 4807^2 .

It is a super-2 number, since 2×185134690² = 68549706882792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (185134693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21996 + ... + 29224.

Almost surely, 2^185134690 is an apocalyptic number.

185134690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

185134690 is a deficient number, since it is larger than the sum of its proper divisors (175613390).

185134690 is a wasteful number, since it uses less digits than its factorization.

185134690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 185134690 is about 13606.4209107318. The cubic root of 185134690 is about 569.9401701848.

The spelling of 185134690 in words is "one hundred eighty-five million, one hundred thirty-four thousand, six hundred ninety".