72578487 has 16 divisors (see below), whose sum is σ = 100622592. Its totient is φ = 46495680.

The previous prime is 72578477. The next prime is 72578489. The reversal of 72578487 is 78487527.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-72578487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72578489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3838 + ... + 12644.

It is an arithmetic number, because the mean of its divisors is an integer number (6288912).

Almost surely, 2^72578487 is an apocalyptic number.

72578487 is a deficient number, since it is larger than the sum of its proper divisors (28044105).

72578487 is a wasteful number, since it uses less digits than its factorization.

72578487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918.

The product of its digits is 878080, while the sum is 48.

The square root of 72578487 is about 8519.3008515957. The cubic root of 72578487 is about 417.1279619254.

The spelling of 72578487 in words is "seventy-two million, five hundred seventy-eight thousand, four hundred eighty-seven".