72889888 has 12 divisors (see below), whose sum is σ = 143502030. Its totient is φ = 36444928.

The previous prime is 72889823. The next prime is 72889913. The reversal of 72889888 is 88898827.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 94864 = 8532^2 + 308^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1138873 + ... + 1138936.

Almost surely, 2^72889888 is an apocalyptic number.

It is an amenable number.

72889888 is a deficient number, since it is larger than the sum of its proper divisors (70612142).

72889888 is a wasteful number, since it uses less digits than its factorization.

72889888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277819 (or 2277811 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 58.

The square root of 72889888 is about 8537.5574961461. The cubic root of 72889888 is about 417.7236790101.

The spelling of 72889888 in words is "seventy-two million, eight hundred eighty-nine thousand, eight hundred eighty-eight".