78039057 has 8 divisors (see below), whose sum is σ = 104437120. Its totient is φ = 51833520.

The previous prime is 78039053. The next prime is 78039077. The reversal of 78039057 is 75093087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78039057 - 2² = 78039053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78039053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47182 + ... + 48807.

It is an arithmetic number, because the mean of its divisors is an integer number (13054640).

Almost surely, 2^78039057 is an apocalyptic number.

It is an amenable number.

78039057 is a deficient number, since it is larger than the sum of its proper divisors (26398063).

78039057 is a wasteful number, since it uses less digits than its factorization.

78039057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96263.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 78039057 is about 8833.9717568034. The cubic root of 78039057 is about 427.3371713255.

The spelling of 78039057 in words is "seventy-eight million, thirty-nine thousand, fifty-seven".