72774351 has 36 divisors (see below), whose sum is σ = 119545608. Its totient is φ = 42402528.

The previous prime is 72774349. The next prime is 72774371. The reversal of 72774351 is 15347727.

It is not a de Polignac number, because 72774351 - 2¹ = 72774349 is a prime.

It is a super-2 number, since 2×72774351² = 10592212326942402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72774371) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41376 + ... + 43098.

Almost surely, 2^72774351 is an apocalyptic number.

72774351 is a deficient number, since it is larger than the sum of its proper divisors (46771257).

72774351 is a wasteful number, since it uses less digits than its factorization.

72774351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 1758 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 72774351 is about 8530.7884160844. The cubic root of 72774351 is about 417.5028524791.

It can be divided in two parts, 7277 and 4351, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 72774351 in words is "seventy-two million, seven hundred seventy-four thousand, three hundred fifty-one".