72639411 has 32 divisors (see below), whose sum is σ = 106928640. Its totient is φ = 43853472.

The previous prime is 72639409. The next prime is 72639431. The reversal of 72639411 is 11493627.

It is not a de Polignac number, because 72639411 - 2¹ = 72639409 is a prime.

Its product of digits (9072) is a multiple of the sum of its prime factors (252).

It is not an unprimeable number, because it can be changed into a prime (72639431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678820 + ... + 678926.

It is an arithmetic number, because the mean of its divisors is an integer number (3341520).

Almost surely, 2^72639411 is an apocalyptic number.

72639411 is a deficient number, since it is larger than the sum of its proper divisors (34289229).

72639411 is a wasteful number, since it uses less digits than its factorization.

72639411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 226 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 72639411 is about 8522.8757470704. The cubic root of 72639411 is about 417.2446447862.

The spelling of 72639411 in words is "seventy-two million, six hundred thirty-nine thousand, four hundred eleven".