72450549 has 12 divisors (see below), whose sum is σ = 110806956. Its totient is φ = 45459072.

The previous prime is 72450479. The next prime is 72450559. The reversal of 72450549 is 94505427.

72450549 is a `hidden beast` number, since 72 + 45 + 0 + 549 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23590449 + 48860100 = 4857^2 + 6990^2 .

It is not a de Polignac number, because 72450549 - 2⁸ = 72450293 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72450559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236614 + ... + 236919.

It is an arithmetic number, because the mean of its divisors is an integer number (9233913).

Almost surely, 2^72450549 is an apocalyptic number.

It is an amenable number.

72450549 is a deficient number, since it is larger than the sum of its proper divisors (38356407).

72450549 is a wasteful number, since it uses less digits than its factorization.

72450549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473556 (or 473553 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 72450549 is about 8511.7888249181. The cubic root of 72450549 is about 416.8827198089.

The spelling of 72450549 in words is "seventy-two million, four hundred fifty thousand, five hundred forty-nine".