78946408 has 16 divisors (see below), whose sum is σ = 148845060. Its totient is φ = 39254400.

The previous prime is 78946397. The next prime is 78946421. The reversal of 78946408 is 80464987.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67535524 + 11410884 = 8218^2 + 3378^2 .

It is a super-2 number, since 2×78946408² = 12465070672204928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25813 + ... + 28708.

Almost surely, 2^78946408 is an apocalyptic number.

It is an amenable number.

78946408 is a deficient number, since it is larger than the sum of its proper divisors (69898652).

78946408 is a wasteful number, since it uses less digits than its factorization.

78946408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54708 (or 54704 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 78946408 is about 8885.1791203104. The cubic root of 78946408 is about 428.9869934458.

The spelling of 78946408 in words is "seventy-eight million, nine hundred forty-six thousand, four hundred eight".