39497690 has 16 divisors (see below), whose sum is σ = 71168328. Its totient is φ = 15782976.

The previous prime is 39497687. The next prime is 39497729. The reversal of 39497690 is 9679493.

It can be written as a sum of positive squares in 4 ways, for example, as 26759929 + 12737761 = 5173^2 + 3569^2 .

It is a super-2 number, since 2×39497690² = 3120135030672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15764 + ... + 18096.

Almost surely, 2^39497690 is an apocalyptic number.

39497690 is a deficient number, since it is larger than the sum of its proper divisors (31670638).

39497690 is a wasteful number, since it uses less digits than its factorization.

39497690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 39497690 is about 6284.7187685687. The cubic root of 39497690 is about 340.5575914080.

The spelling of 39497690 in words is "thirty-nine million, four hundred ninety-seven thousand, six hundred ninety".