72209888 has 12 divisors (see below), whose sum is σ = 142163280. Its totient is φ = 36104928.

The previous prime is 72209873. The next prime is 72209927. The reversal of 72209888 is 88890227.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1128248 + ... + 1128311.

It is an arithmetic number, because the mean of its divisors is an integer number (11846940).

Almost surely, 2^72209888 is an apocalyptic number.

It is an amenable number.

72209888 is a deficient number, since it is larger than the sum of its proper divisors (69953392).

72209888 is a wasteful number, since it uses less digits than its factorization.

72209888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256569 (or 2256561 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 72209888 is about 8497.6401430044. The cubic root of 72209888 is about 416.4206174699.

The spelling of 72209888 in words is "seventy-two million, two hundred nine thousand, eight hundred eighty-eight".