72442787 has 4 divisors (see below), whose sum is σ = 72479400. Its totient is φ = 72406176.

The previous prime is 72442771. The next prime is 72442793. The reversal of 72442787 is 78724427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78724427 = 2647 ⋅29741.

It is a cyclic number.

It is not a de Polignac number, because 72442787 - 2⁴ = 72442771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72442717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15158 + ... + 19355.

It is an arithmetic number, because the mean of its divisors is an integer number (18119850).

Almost surely, 2^72442787 is an apocalyptic number.

72442787 is a deficient number, since it is larger than the sum of its proper divisors (36613).

72442787 is a wasteful number, since it uses less digits than its factorization.

72442787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36612.

The product of its digits is 175616, while the sum is 41.

The square root of 72442787 is about 8511.3328568445. The cubic root of 72442787 is about 416.8678316805.

The spelling of 72442787 in words is "seventy-two million, four hundred forty-two thousand, seven hundred eighty-seven".