72722040 has 32 divisors (see below), whose sum is σ = 218166480. Its totient is φ = 19392512.

The previous prime is 72722033. The next prime is 72722051. The reversal of 72722040 is 4022727.

It is a super-3 number, since 3×72722040³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 72722040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302889 + ... + 303128.

Almost surely, 2^72722040 is an apocalyptic number.

It is an amenable number.

72722040 is an abundant number, since it is smaller than the sum of its proper divisors (145444440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72722040 is a wasteful number, since it uses less digits than its factorization.

72722040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606031 (or 606027 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 72722040 is about 8527.7218528749. The cubic root of 72722040 is about 417.4027932941.

Adding to 72722040 its reverse (4022727), we get a palindrome (76744767).

The spelling of 72722040 in words is "seventy-two million, seven hundred twenty-two thousand, forty".