72447490 has 16 divisors (see below), whose sum is σ = 130588920. Its totient is φ = 28938240.

The previous prime is 72447461. The next prime is 72447511. The reversal of 72447490 is 9474427.

It can be written as a sum of positive squares in 4 ways, for example, as 48818169 + 23629321 = 6987^2 + 4861^2 .

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, 2980 + ... + 12400.

Almost surely, 2^72447490 is an apocalyptic number.

72447490 is a deficient number, since it is larger than the sum of its proper divisors (58141430).

72447490 is a wasteful number, since it uses less digits than its factorization.

72447490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 72447490 is about 8511.6091310633. The cubic root of 72447490 is about 416.8768525325.

The spelling of 72447490 in words is "seventy-two million, four hundred forty-seven thousand, four hundred ninety".