72388441 has 4 divisors (see below), whose sum is σ = 74723584. Its totient is φ = 70053300.

The previous prime is 72388409. The next prime is 72388487. The reversal of 72388441 is 14488327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14488327 = 7 ⋅2069761.

It is a cyclic number.

It is not a de Polignac number, because 72388441 - 2⁵ = 72388409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72388441.

It is not an unprimeable number, because it can be changed into a prime (72388541) 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, 1167525 + ... + 1167586.

It is an arithmetic number, because the mean of its divisors is an integer number (18680896).

Almost surely, 2^72388441 is an apocalyptic number.

It is an amenable number.

72388441 is a deficient number, since it is larger than the sum of its proper divisors (2335143).

72388441 is a wasteful number, since it uses less digits than its factorization.

72388441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335142.

The product of its digits is 43008, while the sum is 37.

The square root of 72388441 is about 8508.1396909078. The cubic root of 72388441 is about 416.7635619632.

The spelling of 72388441 in words is "seventy-two million, three hundred eighty-eight thousand, four hundred forty-one".