72388442 has 24 divisors (see below), whose sum is σ = 130978656. Its totient is φ = 29388744.

The previous prime is 72388409. The next prime is 72388487. The reversal of 72388442 is 24488327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 72388396 and 72388405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2108 + ... + 12215.

It is an arithmetic number, because the mean of its divisors is an integer number (5457444).

Almost surely, 2^72388442 is an apocalyptic number.

72388442 is a deficient number, since it is larger than the sum of its proper divisors (58590214).

72388442 is a wasteful number, since it uses less digits than its factorization.

72388442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14370 (or 14351 counting only the distinct ones).

The product of its digits is 86016, while the sum is 38.

The square root of 72388442 is about 8508.1397496750. The cubic root of 72388442 is about 416.7635638823.

The spelling of 72388442 in words is "seventy-two million, three hundred eighty-eight thousand, four hundred forty-two".