72107450 has 24 divisors (see below), whose sum is σ = 137748252. Its totient is φ = 28062720.

The previous prime is 72107449. The next prime is 72107459. The reversal of 72107450 is 5470127.

It can be written as a sum of positive squares in 6 ways, for example, as 23261329 + 48846121 = 4823^2 + 6989^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72107459) 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, 17639 + ... + 21338.

Almost surely, 2^72107450 is an apocalyptic number.

72107450 is a deficient number, since it is larger than the sum of its proper divisors (65640802).

72107450 is a wasteful number, since it uses less digits than its factorization.

72107450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39026 (or 39021 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 72107450 is about 8491.6105657290. The cubic root of 72107450 is about 416.2236108284.

Adding to 72107450 its reverse (5470127), we get a palindrome (77577577).

The spelling of 72107450 in words is "seventy-two million, one hundred seven thousand, four hundred fifty".