39408699640 has 32 divisors (see below), whose sum is σ = 88678356480. Its totient is φ = 15761918592.

The previous prime is 39408699623. The next prime is 39408699643. The reversal of 39408699640 is 4699680493.

It is a super-2 number, since 2×39408699640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39408699643) 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, 414409 + ... + 500551.

It is an arithmetic number, because the mean of its divisors is an integer number (2771198640).

Almost surely, 2^39408699640 is an apocalyptic number.

It is an amenable number.

39408699640 is an abundant number, since it is smaller than the sum of its proper divisors (49269656840).

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

39408699640 is a wasteful number, since it uses less digits than its factorization.

39408699640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97591 (or 97587 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 39408699640 in words is "thirty-nine billion, four hundred eight million, six hundred ninety-nine thousand, six hundred forty".