72697788 has 36 divisors (see below), whose sum is σ = 184471560. Its totient is φ = 24139296.

The previous prime is 72697771. The next prime is 72697789. The reversal of 72697788 is 88779627.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72697789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5931 + ... + 13437.

It is an arithmetic number, because the mean of its divisors is an integer number (5124210).

Almost surely, 2^72697788 is an apocalyptic number.

It is an amenable number.

72697788 is an abundant number, since it is smaller than the sum of its proper divisors (111773772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72697788 is a wasteful number, since it uses less digits than its factorization.

72697788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786 (or 7781 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 72697788 is about 8526.2997836107. The cubic root of 72697788 is about 417.3563883893.

The spelling of 72697788 in words is "seventy-two million, six hundred ninety-seven thousand, seven hundred eighty-eight".