3988817697402 has 48 divisors (see below), whose sum is σ = 8864925916392. Its totient is φ = 1295462730240.

The previous prime is 3988817697367. The next prime is 3988817697427. The reversal of 3988817697402 is 2047967188893.

3988817697402 is a `hidden beast` number, since 3 + 9 + 88 + 81 + 7 + 69 + 7 + 402 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1997442329481 + 1991375367921 = 1413309^2 + 1411161^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3011283 + ... + 4128614.

Almost surely, 2^{3988817697402} is an apocalyptic number.

3988817697402 is an abundant number, since it is smaller than the sum of its proper divisors (4876108218990).

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

3988817697402 is a wasteful number, since it uses less digits than its factorization.

3988817697402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140703 (or 7140700 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 72.

The spelling of 3988817697402 in words is "three trillion, nine hundred eighty-eight billion, eight hundred seventeen million, six hundred ninety-seven thousand, four hundred two".