72638293 has 8 divisors (see below), whose sum is σ = 89401088. Its totient is φ = 57471984.

The previous prime is 72638287. The next prime is 72638299. The reversal of 72638293 is 39283627.

It is an interprime number because it is at equal distance from previous prime (72638287) and next prime (72638299).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72638293 - 2¹³ = 72630101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72638299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399021 + ... + 399202.

It is an arithmetic number, because the mean of its divisors is an integer number (11175136).

Almost surely, 2^72638293 is an apocalyptic number.

It is an amenable number.

72638293 is a deficient number, since it is larger than the sum of its proper divisors (16762795).

72638293 is a wasteful number, since it uses less digits than its factorization.

72638293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798243.

The product of its digits is 108864, while the sum is 40.

The square root of 72638293 is about 8522.8101586273. The cubic root of 72638293 is about 417.2425041580.

The spelling of 72638293 in words is "seventy-two million, six hundred thirty-eight thousand, two hundred ninety-three".