39000400690 has 16 divisors (see below), whose sum is σ = 70210874520. Its totient is φ = 15597904000.

The previous prime is 39000400667. The next prime is 39000400697. The reversal of 39000400690 is 9600400093.

It can be written as a sum of positive squares in 4 ways, for example, as 17918231881 + 21082168809 = 133859^2 + 145197^2 .

It is a super-2 number, since 2×39000400690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39000400697) 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, 208525 + ... + 348544.

Almost surely, 2^39000400690 is an apocalyptic number.

39000400690 is a deficient number, since it is larger than the sum of its proper divisors (31210473830).

39000400690 is a wasteful number, since it uses less digits than its factorization.

39000400690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564077.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 39000400690 in words is "thirty-nine billion, four hundred thousand, six hundred ninety".