78675428 has 24 divisors (see below), whose sum is σ = 156078720. Its totient is φ = 34400160.

The previous prime is 78675407. The next prime is 78675449. The reversal of 78675428 is 82457687.

It is an interprime number because it is at equal distance from previous prime (78675407) and next prime (78675449).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38828 + ... + 40803.

It is an arithmetic number, because the mean of its divisors is an integer number (6503280).

Almost surely, 2^78675428 is an apocalyptic number.

It is an amenable number.

78675428 is a deficient number, since it is larger than the sum of its proper divisors (77403292).

78675428 is a wasteful number, since it uses less digits than its factorization.

78675428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79667 (or 79665 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 78675428 is about 8869.9170232872. The cubic root of 78675428 is about 428.4956045964.

The spelling of 78675428 in words is "seventy-eight million, six hundred seventy-five thousand, four hundred twenty-eight".