72239398 has 32 divisors (see below), whose sum is σ = 138251520. Its totient is φ = 27488160.

The previous prime is 72239381. The next prime is 72239411. The reversal of 72239398 is 89393227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1168 + ... + 12076.

It is an arithmetic number, because the mean of its divisors is an integer number (4320360).

Almost surely, 2^72239398 is an apocalyptic number.

72239398 is a deficient number, since it is larger than the sum of its proper divisors (66012122).

72239398 is a wasteful number, since it uses less digits than its factorization.

72239398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10972.

The product of its digits is 163296, while the sum is 43.

The square root of 72239398 is about 8499.3763300609. The cubic root of 72239398 is about 416.4773359201.

The spelling of 72239398 in words is "seventy-two million, two hundred thirty-nine thousand, three hundred ninety-eight".