78740828 has 24 divisors (see below), whose sum is σ = 143836560. Its totient is φ = 37681280.

The previous prime is 78740819. The next prime is 78740843. The reversal of 78740828 is 82804787.

It is a happy number.

It is a congruent number.

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, 4163 + ... + 13221.

It is an arithmetic number, because the mean of its divisors is an integer number (5993190).

Almost surely, 2^78740828 is an apocalyptic number.

It is an amenable number.

78740828 is a deficient number, since it is larger than the sum of its proper divisors (65095732).

78740828 is a wasteful number, since it uses less digits than its factorization.

78740828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 78740828 is about 8873.6028759462. The cubic root of 78740828 is about 428.6143026102.

The spelling of 78740828 in words is "seventy-eight million, seven hundred forty thousand, eight hundred twenty-eight".