72990746 has 4 divisors (see below), whose sum is σ = 109486122. Its totient is φ = 36495372.

The previous prime is 72990727. The next prime is 72990791. The reversal of 72990746 is 64709927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 10817521 = 7885^2 + 3289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72990697 and 72990706.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18247685 + ... + 18247688.

Almost surely, 2^72990746 is an apocalyptic number.

72990746 is a deficient number, since it is larger than the sum of its proper divisors (36495376).

72990746 is a wasteful number, since it uses less digits than its factorization.

72990746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36495375.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 72990746 is about 8543.4621787657. The cubic root of 72990746 is about 417.9162587983.

The spelling of 72990746 in words is "seventy-two million, nine hundred ninety thousand, seven hundred forty-six".