78057500 has 30 divisors (see below), whose sum is σ = 170701608. Its totient is φ = 31222000.

The previous prime is 78057493. The next prime is 78057503. The reversal of 78057500 is 575087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78057503) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13112 + ... + 18111.

Almost surely, 2^78057500 is an apocalyptic number.

It is an amenable number.

78057500 is an abundant number, since it is smaller than the sum of its proper divisors (92644108).

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

78057500 is a wasteful number, since it uses less digits than its factorization.

78057500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31247 (or 31230 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 78057500 is about 8835.0155630876. The cubic root of 78057500 is about 427.3708329259.

The spelling of 78057500 in words is "seventy-eight million, fifty-seven thousand, five hundred".