72028332 has 24 divisors (see below), whose sum is σ = 186740400. Its totient is φ = 24009408.

The previous prime is 72028309. The next prime is 72028343. The reversal of 72028332 is 23382027.

It is a super-2 number, since 2×72028332² = 10376161221404448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 72028296 and 72028305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333357 + ... + 333572.

It is an arithmetic number, because the mean of its divisors is an integer number (7780850).

Almost surely, 2^72028332 is an apocalyptic number.

It is an amenable number.

72028332 is an abundant number, since it is smaller than the sum of its proper divisors (114712068).

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

72028332 is a wasteful number, since it uses less digits than its factorization.

72028332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666942 (or 666934 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 72028332 is about 8486.9506891462. The cubic root of 72028332 is about 416.0713249868.

The spelling of 72028332 in words is "seventy-two million, twenty-eight thousand, three hundred thirty-two".