39970357984 has 48 divisors (see below), whose sum is σ = 79665610752. Its totient is φ = 19738850688.

The previous prime is 39970357981. The next prime is 39970357991. The reversal of 39970357984 is 48975307993.

It is a happy number.

It is a super-2 number, since 2×39970357984² (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 (39970357981) 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, 1246537 + ... + 1278199.

It is an arithmetic number, because the mean of its divisors is an integer number (1659700224).

Almost surely, 2^39970357984 is an apocalyptic number.

It is an amenable number.

39970357984 is a deficient number, since it is larger than the sum of its proper divisors (39695252768).

39970357984 is a wasteful number, since it uses less digits than its factorization.

39970357984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32159 (or 32151 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 64.

The spelling of 39970357984 in words is "thirty-nine billion, nine hundred seventy million, three hundred fifty-seven thousand, nine hundred eighty-four".