72887660 has 24 divisors (see below), whose sum is σ = 154583856. Its totient is φ = 28865600.

The previous prime is 72887593. The next prime is 72887663. The reversal of 72887660 is 6678827.

It is a happy number.

It is a super-2 number, since 2×72887660² = 10625221960551200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72887663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16022 + ... + 20061.

It is an arithmetic number, because the mean of its divisors is an integer number (6440994).

Almost surely, 2^72887660 is an apocalyptic number.

It is an amenable number.

72887660 is an abundant number, since it is smaller than the sum of its proper divisors (81696196).

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

72887660 is a wasteful number, since it uses less digits than its factorization.

72887660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36193 (or 36191 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 72887660 is about 8537.4270128652. The cubic root of 72887660 is about 417.7194228283.

It can be divided in two parts, 728 and 87660, that added together give a palindrome (88388).

The spelling of 72887660 in words is "seventy-two million, eight hundred eighty-seven thousand, six hundred sixty".