72263439 has 6 divisors (see below), whose sum is σ = 104380536. Its totient is φ = 48175620.

The previous prime is 72263431. The next prime is 72263501. The reversal of 72263439 is 93436227.

It is a happy number.

It is not a de Polignac number, because 72263439 - 2³ = 72263431 is a prime.

It is a super-2 number, since 2×72263439² = 10444009232213442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72263431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4014627 + ... + 4014644.

It is an arithmetic number, because the mean of its divisors is an integer number (17396756).

Almost surely, 2^72263439 is an apocalyptic number.

72263439 is a deficient number, since it is larger than the sum of its proper divisors (32117097).

72263439 is a wasteful number, since it uses less digits than its factorization.

72263439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8029277 (or 8029274 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 72263439 is about 8500.7904926542. The cubic root of 72263439 is about 416.5235314930.

The spelling of 72263439 in words is "seventy-two million, two hundred sixty-three thousand, four hundred thirty-nine".