39129690 has 32 divisors (see below), whose sum is σ = 94277376. Its totient is φ = 10393920.

The previous prime is 39129689. The next prime is 39129707. The reversal of 39129690 is 9692193.

It is a happy number.

It is a super-2 number, since 2×39129690² = 3062265278992200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5724 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (2946168).

Almost surely, 2^39129690 is an apocalyptic number.

39129690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39129690 is an abundant number, since it is smaller than the sum of its proper divisors (55147686).

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

39129690 is a wasteful number, since it uses less digits than its factorization.

39129690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 39129690 is about 6255.3728905638. The cubic root of 39129690 is about 339.4966311411.

The spelling of 39129690 in words is "thirty-nine million, one hundred twenty-nine thousand, six hundred ninety".