78472998 has 24 divisors (see below), whose sum is σ = 170189136. Its totient is φ = 26132400.

The previous prime is 78472993. The next prime is 78473011. The reversal of 78472998 is 89927487.

It is a super-2 number, since 2×78472998² = 12316022830216008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31768 + ... + 34148.

It is an arithmetic number, because the mean of its divisors is an integer number (7091214).

Almost surely, 2^78472998 is an apocalyptic number.

78472998 is an abundant number, since it is smaller than the sum of its proper divisors (91716138).

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

78472998 is a wasteful number, since it uses less digits than its factorization.

78472998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220 (or 4217 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 78472998 is about 8858.4986312580. The cubic root of 78472998 is about 428.1277859623.

The spelling of 78472998 in words is "seventy-eight million, four hundred seventy-two thousand, nine hundred ninety-eight".