7998685400 has 24 divisors (see below), whose sum is σ = 18596944020. Its totient is φ = 3199474080.

The previous prime is 7998685397. The next prime is 7998685421. The reversal of 7998685400 is 45868997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19996514 + ... + 19996913.

Almost surely, 2^7998685400 is an apocalyptic number.

It is an amenable number.

7998685400 is an abundant number, since it is smaller than the sum of its proper divisors (10598258620).

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

7998685400 is a wasteful number, since it uses less digits than its factorization.

7998685400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39993443 (or 39993434 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 7998685400 is about 89435.3699606593. The cubic root of 7998685400 is about 1999.8904439989.

The spelling of 7998685400 in words is "seven billion, nine hundred ninety-eight million, six hundred eighty-five thousand, four hundred".