72883634 has 4 divisors (see below), whose sum is σ = 109325454. Its totient is φ = 36441816.

The previous prime is 72883627. The next prime is 72883663. The reversal of 72883634 is 43638827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43638827 = 83 ⋅525769.

It can be written as a sum of positive squares in only one way, i.e., 69472225 + 3411409 = 8335^2 + 1847^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72883591 and 72883600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18220907 + ... + 18220910.

Almost surely, 2^72883634 is an apocalyptic number.

72883634 is a deficient number, since it is larger than the sum of its proper divisors (36441820).

72883634 is a wasteful number, since it uses less digits than its factorization.

72883634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36441819.

The product of its digits is 193536, while the sum is 41.

The square root of 72883634 is about 8537.1912242845. The cubic root of 72883634 is about 417.7117316802.

The spelling of 72883634 in words is "seventy-two million, eight hundred eighty-three thousand, six hundred thirty-four".