78408788 has 12 divisors (see below), whose sum is σ = 138203520. Its totient is φ = 38922072.

The previous prime is 78408773. The next prime is 78408793. The reversal of 78408788 is 88780487.

It is a super-2 number, since 2×78408788² = 12295876071257888, 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 3 ways as a sum of consecutive naturals, for example, 69956 + ... + 71067.

It is an arithmetic number, because the mean of its divisors is an integer number (11516960).

Almost surely, 2^78408788 is an apocalyptic number.

It is an amenable number.

78408788 is a deficient number, since it is larger than the sum of its proper divisors (59794732).

78408788 is a wasteful number, since it uses less digits than its factorization.

78408788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141166 (or 141164 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 78408788 is about 8854.8736862815. The cubic root of 78408788 is about 428.0109832102.

The spelling of 78408788 in words is "seventy-eight million, four hundred eight thousand, seven hundred eighty-eight".