39894688 has 24 divisors (see below), whose sum is σ = 78763860. Its totient is φ = 19891200.

The previous prime is 39894683. The next prime is 39894689. The reversal of 39894688 is 88649893.

It can be written as a sum of positive squares in 2 ways, for example, as 38787984 + 1106704 = 6228^2 + 1052^2 .

It is a super-2 number, since 2×39894688² = 3183172261234688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39894683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11278 + ... + 14386.

Almost surely, 2^39894688 is an apocalyptic number.

It is an amenable number.

39894688 is a deficient number, since it is larger than the sum of its proper divisors (38869172).

39894688 is a wasteful number, since it uses less digits than its factorization.

39894688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520 (or 3512 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 39894688 is about 6316.2241885481. The cubic root of 39894688 is about 341.6947905728.

The spelling of 39894688 in words is "thirty-nine million, eight hundred ninety-four thousand, six hundred eighty-eight".