78406198 has 48 divisors (see below), whose sum is σ = 139006800. Its totient is φ = 33022080.

The previous prime is 78406189. The next prime is 78406201. The reversal of 78406198 is 89160487.

It is a super-2 number, since 2×78406198² = 12295063769630408, which 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 23 ways as a sum of consecutive naturals, for example, 186028 + ... + 186448.

It is an arithmetic number, because the mean of its divisors is an integer number (2895975).

Almost surely, 2^78406198 is an apocalyptic number.

78406198 is a deficient number, since it is larger than the sum of its proper divisors (60600602).

78406198 is a wasteful number, since it uses less digits than its factorization.

78406198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 78406198 is about 8854.7274379283. The cubic root of 78406198 is about 428.0062704703.

The spelling of 78406198 in words is "seventy-eight million, four hundred six thousand, one hundred ninety-eight".