78572975 has 24 divisors (see below), whose sum is σ = 105357840. Its totient is φ = 57784320.

The previous prime is 78572971. The next prime is 78572981. The reversal of 78572975 is 57927587.

It is not a de Polignac number, because 78572975 - 2² = 78572971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78572971) 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, 135887 + ... + 136463.

It is an arithmetic number, because the mean of its divisors is an integer number (4389910).

Almost surely, 2^78572975 is an apocalyptic number.

78572975 is a deficient number, since it is larger than the sum of its proper divisors (26784865).

78572975 is a wasteful number, since it uses less digits than its factorization.

78572975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019 (or 1014 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 50.

The square root of 78572975 is about 8864.1398341858. The cubic root of 78572975 is about 428.3095247692.

The spelling of 78572975 in words is "seventy-eight million, five hundred seventy-two thousand, nine hundred seventy-five".