72826505 has 8 divisors (see below), whose sum is σ = 89041032. Its totient is φ = 57161728.

The previous prime is 72826463. The next prime is 72826549. The reversal of 72826505 is 50562827.

It can be written as a sum of positive squares in 4 ways, for example, as 2199289 + 70627216 = 1483^2 + 8404^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72826505 - 2²⁶ = 5717641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137144 + ... + 137673.

It is an arithmetic number, because the mean of its divisors is an integer number (11130129).

Almost surely, 2^72826505 is an apocalyptic number.

It is an amenable number.

72826505 is a deficient number, since it is larger than the sum of its proper divisors (16214527).

72826505 is a wasteful number, since it uses less digits than its factorization.

72826505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274875.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 72826505 is about 8533.8446786897. The cubic root of 72826505 is about 417.6025636363.

The spelling of 72826505 in words is "seventy-two million, eight hundred twenty-six thousand, five hundred five".