78508956 has 12 divisors (see below), whose sum is σ = 183187592. Its totient is φ = 26169648.

The previous prime is 78508951. The next prime is 78508961. The reversal of 78508956 is 65980587.

It is an interprime number because it is at equal distance from previous prime (78508951) and next prime (78508961).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78508951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271195 + ... + 3271218.

Almost surely, 2^78508956 is an apocalyptic number.

It is an amenable number.

78508956 is an abundant number, since it is smaller than the sum of its proper divisors (104678636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78508956 is a wasteful number, since it uses less digits than its factorization.

78508956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542420 (or 6542418 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 78508956 is about 8860.5279752394. The cubic root of 78508956 is about 428.1931684019.

The spelling of 78508956 in words is "seventy-eight million, five hundred eight thousand, nine hundred fifty-six".