72797762 has 4 divisors (see below), whose sum is σ = 109196646. Its totient is φ = 36398880.

The previous prime is 72797761. The next prime is 72797807. The reversal of 72797762 is 26779727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26779727 = 13 ⋅2059979.

It can be written as a sum of positive squares in only one way, i.e., 68873401 + 3924361 = 8299^2 + 1981^2 .

It is not an unprimeable number, because it can be changed into a prime (72797761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18199439 + ... + 18199442.

Almost surely, 2^72797762 is an apocalyptic number.

72797762 is a deficient number, since it is larger than the sum of its proper divisors (36398884).

72797762 is a wasteful number, since it uses less digits than its factorization.

72797762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36398883.

The product of its digits is 518616, while the sum is 47.

The square root of 72797762 is about 8532.1604532498. The cubic root of 72797762 is about 417.5476169290.

It can be divided in two parts, 727 and 97762, that added together give a palindrome (98489).

The spelling of 72797762 in words is "seventy-two million, seven hundred ninety-seven thousand, seven hundred sixty-two".