8978397500 has 30 divisors (see below), whose sum is σ = 19633965120. Its totient is φ = 3591358000.

The previous prime is 8978397497. The next prime is 8978397523. The reversal of 8978397500 is 57938798.

It is a super-2 number, since 2×8978397500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1793180 + ... + 1798179.

It is an arithmetic number, because the mean of its divisors is an integer number (654465504).

Almost surely, 2^8978397500 is an apocalyptic number.

It is an amenable number.

8978397500 is an abundant number, since it is smaller than the sum of its proper divisors (10655567620).

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

8978397500 is a wasteful number, since it uses less digits than its factorization.

8978397500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591383 (or 3591366 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 56.

The square root of 8978397500 is about 94754.4062300007. The cubic root of 8978397500 is about 2078.4182300528.

The spelling of 8978397500 in words is "eight billion, nine hundred seventy-eight million, three hundred ninety-seven thousand, five hundred".