72651140 has 12 divisors (see below), whose sum is σ = 152567436. Its totient is φ = 29060448.

The previous prime is 72651127. The next prime is 72651151. The reversal of 72651140 is 4115627.

It can be written as a sum of positive squares in 2 ways, for example, as 36675136 + 35976004 = 6056^2 + 5998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816259 + ... + 1816298.

It is an arithmetic number, because the mean of its divisors is an integer number (12713953).

Almost surely, 2^72651140 is an apocalyptic number.

It is an amenable number.

72651140 is an abundant number, since it is smaller than the sum of its proper divisors (79916296).

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

72651140 is a wasteful number, since it uses less digits than its factorization.

72651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632566 (or 3632564 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72651140 is about 8523.5638086425. The cubic root of 72651140 is about 417.2671009111.

Adding to 72651140 its reverse (4115627), we get a palindrome (76766767).

The spelling of 72651140 in words is "seventy-two million, six hundred fifty-one thousand, one hundred forty".