72106724 has 12 divisors (see below), whose sum is σ = 133609644. Its totient is φ = 33932544.

The previous prime is 72106721. The next prime is 72106733. The reversal of 72106724 is 42760127.

It can be written as a sum of positive squares in 2 ways, for example, as 27457600 + 44649124 = 5240^2 + 6682^2 .

It is not an unprimeable number, because it can be changed into a prime (72106721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530129 + ... + 530264.

It is an arithmetic number, because the mean of its divisors is an integer number (11134137).

Almost surely, 2^72106724 is an apocalyptic number.

It is an amenable number.

72106724 is a deficient number, since it is larger than the sum of its proper divisors (61502920).

72106724 is a wasteful number, since it uses less digits than its factorization.

72106724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060414 (or 1060412 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 72106724 is about 8491.5678175470. The cubic root of 72106724 is about 416.2222139346. Note that the first 4 decimals are identical.

The spelling of 72106724 in words is "seventy-two million, one hundred six thousand, seven hundred twenty-four".