77282725 has 24 divisors (see below), whose sum is σ = 103633992. Its totient is φ = 56832000.

The previous prime is 77282707. The next prime is 77282741. The reversal of 77282725 is 52728277.

It can be written as a sum of positive squares in 12 ways, for example, as 8076964 + 69205761 = 2842^2 + 8319^2 .

It is not a de Polignac number, because 77282725 - 2⁵ = 77282693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130029 + ... + 130621.

It is an arithmetic number, because the mean of its divisors is an integer number (4318083).

Almost surely, 2^77282725 is an apocalyptic number.

It is an amenable number.

77282725 is a deficient number, since it is larger than the sum of its proper divisors (26351267).

77282725 is a wasteful number, since it uses less digits than its factorization.

77282725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1012 counting only the distinct ones).

The product of its digits is 109760, while the sum is 40.

The square root of 77282725 is about 8791.0593787097. The cubic root of 77282725 is about 425.9521444035.

It can be divided in two parts, 7728272 and 5, that added together give a palindrome (7728277).

The spelling of 77282725 in words is "seventy-seven million, two hundred eighty-two thousand, seven hundred twenty-five".