72578766 has 32 divisors (see below), whose sum is σ = 156649248. Its totient is φ = 22285440.

The previous prime is 72578749. The next prime is 72578767. The reversal of 72578766 is 66787527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72578767) 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, 67876 + ... + 68936.

It is an arithmetic number, because the mean of its divisors is an integer number (4895289).

Almost surely, 2^72578766 is an apocalyptic number.

72578766 is an abundant number, since it is smaller than the sum of its proper divisors (84070482).

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

72578766 is a wasteful number, since it uses less digits than its factorization.

72578766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956.

The product of its digits is 987840, while the sum is 48.

The square root of 72578766 is about 8519.3172261631. The cubic root of 72578766 is about 417.1284964205.

The spelling of 72578766 in words is "seventy-two million, five hundred seventy-eight thousand, seven hundred sixty-six".