72473570 has 16 divisors (see below), whose sum is σ = 140487480. Its totient is φ = 26759424.

The previous prime is 72473521. The next prime is 72473591. The reversal of 72473570 is 7537427.

It can be written as a sum of positive squares in 4 ways, for example, as 26491609 + 45981961 = 5147^2 + 6781^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72473570.

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, 278615 + ... + 278874.

Almost surely, 2^72473570 is an apocalyptic number.

72473570 is a deficient number, since it is larger than the sum of its proper divisors (68013910).

72473570 is a wasteful number, since it uses less digits than its factorization.

72473570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557509.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 72473570 is about 8513.1410184491. The cubic root of 72473570 is about 416.9268696505.

The spelling of 72473570 in words is "seventy-two million, four hundred seventy-three thousand, five hundred seventy".