72838379 has 4 divisors (see below), whose sum is σ = 73370184. Its totient is φ = 72306576.

The previous prime is 72838369. The next prime is 72838399. The reversal of 72838379 is 97383827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97383827 = 29 ⋅3358063.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72838379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72838369) 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, 265697 + ... + 265970.

It is an arithmetic number, because the mean of its divisors is an integer number (18342546).

Almost surely, 2^72838379 is an apocalyptic number.

72838379 is a deficient number, since it is larger than the sum of its proper divisors (531805).

72838379 is a wasteful number, since it uses less digits than its factorization.

72838379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531804.

The product of its digits is 508032, while the sum is 47.

The square root of 72838379 is about 8534.5403508332. The cubic root of 72838379 is about 417.6252584110.

The spelling of 72838379 in words is "seventy-two million, eight hundred thirty-eight thousand, three hundred seventy-nine".