78538976 has 12 divisors (see below), whose sum is σ = 154623672. Its totient is φ = 39269472.

The previous prime is 78538973. The next prime is 78538979. The reversal of 78538976 is 67983587.

It is an interprime number because it is at equal distance from previous prime (78538973) and next prime (78538979).

It is a super-2 number, since 2×78538976² = 12336741502257152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78538973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227140 + ... + 1227203.

It is an arithmetic number, because the mean of its divisors is an integer number (12885306).

Almost surely, 2^78538976 is an apocalyptic number.

It is an amenable number.

78538976 is a deficient number, since it is larger than the sum of its proper divisors (76084696).

78538976 is a wasteful number, since it uses less digits than its factorization.

78538976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454353 (or 2454345 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The square root of 78538976 is about 8862.2218433077. The cubic root of 78538976 is about 428.2477384854.

The spelling of 78538976 in words is "seventy-eight million, five hundred thirty-eight thousand, nine hundred seventy-six".