78990898 has 16 divisors (see below), whose sum is σ = 135586944. Its totient is φ = 33809760.

The previous prime is 78990881. The next prime is 78990907. The reversal of 78990898 is 89809987.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9238 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (8474184).

Almost surely, 2^78990898 is an apocalyptic number.

78990898 is a deficient number, since it is larger than the sum of its proper divisors (56596046).

78990898 is a wasteful number, since it uses less digits than its factorization.

78990898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 78990898 is about 8887.6823750627. The cubic root of 78990898 is about 429.0675630699.

The spelling of 78990898 in words is "seventy-eight million, nine hundred ninety thousand, eight hundred ninety-eight".