77028525 has 36 divisors (see below), whose sum is σ = 157679392. Its totient is φ = 35212320.

The previous prime is 77028509. The next prime is 77028599. The reversal of 77028525 is 52582077.

It is not a de Polignac number, because 77028525 - 2⁴ = 77028509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77028525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22879 + ... + 26028.

Almost surely, 2^77028525 is an apocalyptic number.

77028525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77028525 is an abundant number, since it is smaller than the sum of its proper divisors (80650867).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77028525 is a wasteful number, since it uses less digits than its factorization.

77028525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48930 (or 48922 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 77028525 is about 8776.5895996110. The cubic root of 77028525 is about 425.4846144424.

The spelling of 77028525 in words is "seventy-seven million, twenty-eight thousand, five hundred twenty-five".