77428527 has 16 divisors (see below), whose sum is σ = 112771200. Its totient is φ = 46864800.

The previous prime is 77428501. The next prime is 77428567. The reversal of 77428527 is 72582477.

It is not a de Polignac number, because 77428527 - 2⁸ = 77428271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77428567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44724 + ... + 46422.

It is an arithmetic number, because the mean of its divisors is an integer number (7048200).

Almost surely, 2^77428527 is an apocalyptic number.

77428527 is a deficient number, since it is larger than the sum of its proper divisors (35342673).

77428527 is a wasteful number, since it uses less digits than its factorization.

77428527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094.

The product of its digits is 219520, while the sum is 42.

The square root of 77428527 is about 8799.3481008538. The cubic root of 77428527 is about 426.2198439865.

The spelling of 77428527 in words is "seventy-seven million, four hundred twenty-eight thousand, five hundred twenty-seven".