78359477 has 24 divisors (see below), whose sum is σ = 101615040. Its totient is φ = 59875200.

The previous prime is 78359471. The next prime is 78359497. The reversal of 78359477 is 77495387.

It is a de Polignac number, because none of the positive numbers 2^k-78359477 is a prime.

It is a super-2 number, since 2×78359477² = 12280415271427058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78359471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13352 + ... + 18302.

It is an arithmetic number, because the mean of its divisors is an integer number (4233960).

Almost surely, 2^78359477 is an apocalyptic number.

It is an amenable number.

78359477 is a deficient number, since it is larger than the sum of its proper divisors (23255563).

78359477 is a wasteful number, since it uses less digits than its factorization.

78359477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001 (or 4994 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 50.

The square root of 78359477 is about 8852.0888495315. The cubic root of 78359477 is about 427.9212395471.

The spelling of 78359477 in words is "seventy-eight million, three hundred fifty-nine thousand, four hundred seventy-seven".