72408562 has 4 divisors (see below), whose sum is σ = 108612846. Its totient is φ = 36204280.

The previous prime is 72408551. The next prime is 72408571. The reversal of 72408562 is 26580427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72233001 + 175561 = 8499^2 + 419^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18102139 + ... + 18102142.

Almost surely, 2^72408562 is an apocalyptic number.

72408562 is a deficient number, since it is larger than the sum of its proper divisors (36204284).

72408562 is a wasteful number, since it uses less digits than its factorization.

72408562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36204283.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 72408562 is about 8509.3220646536. The cubic root of 72408562 is about 416.8021727444.

Adding to 72408562 its reverse (26580427), we get a palindrome (98988989).

The spelling of 72408562 in words is "seventy-two million, four hundred eight thousand, five hundred sixty-two".