72028444 has 6 divisors (see below), whose sum is σ = 126049784. Its totient is φ = 36014220.

The previous prime is 72028427. The next prime is 72028457. The reversal of 72028444 is 44482027.

It is a super-2 number, since 2×72028444² = 10376193490122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9003552 + ... + 9003559.

Almost surely, 2^72028444 is an apocalyptic number.

It is an amenable number.

72028444 is a deficient number, since it is larger than the sum of its proper divisors (54021340).

72028444 is a wasteful number, since it uses less digits than its factorization.

72028444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18007115 (or 18007113 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 72028444 is about 8486.9572875089. The cubic root of 72028444 is about 416.0715406425.

The spelling of 72028444 in words is "seventy-two million, twenty-eight thousand, four hundred forty-four".