72040688 has 10 divisors (see below), whose sum is σ = 139578864. Its totient is φ = 36020336.

The previous prime is 72040687. The next prime is 72040691. The reversal of 72040688 is 88604027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72040681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251256 + ... + 2251287.

Almost surely, 2^72040688 is an apocalyptic number.

It is an amenable number.

72040688 is a deficient number, since it is larger than the sum of its proper divisors (67538176).

72040688 is a wasteful number, since it uses less digits than its factorization.

72040688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502551 (or 4502545 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 72040688 is about 8487.6785990046. The cubic root of 72040688 is about 416.0951150854.

The spelling of 72040688 in words is "seventy-two million, forty thousand, six hundred eighty-eight".