72810433 has 4 divisors (see below), whose sum is σ = 75976128. Its totient is φ = 69644740.

The previous prime is 72810427. The next prime is 72810443. The reversal of 72810433 is 33401827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33401827 = 1531 ⋅21817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72810433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72810443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1582813 + ... + 1582858.

It is an arithmetic number, because the mean of its divisors is an integer number (18994032).

Almost surely, 2^72810433 is an apocalyptic number.

It is an amenable number.

72810433 is a deficient number, since it is larger than the sum of its proper divisors (3165695).

72810433 is a wasteful number, since it uses less digits than its factorization.

72810433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165694.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72810433 is about 8532.9029644078. The cubic root of 72810433 is about 417.5718412952.

The spelling of 72810433 in words is "seventy-two million, eight hundred ten thousand, four hundred thirty-three".