77028479 has 12 divisors (see below), whose sum is σ = 89650512. Its totient is φ = 65904960.

The previous prime is 77028467. The next prime is 77028499. The reversal of 77028479 is 97482077.

It is a de Polignac number, because none of the positive numbers 2^k-77028479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77028499) 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 11 ways as a sum of consecutive naturals, for example, 16667 + ... + 20780.

It is an arithmetic number, because the mean of its divisors is an integer number (7470876).

Almost surely, 2^77028479 is an apocalyptic number.

77028479 is a deficient number, since it is larger than the sum of its proper divisors (12622033).

77028479 is a wasteful number, since it uses less digits than its factorization.

77028479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37486 (or 37475 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 77028479 is about 8776.5869790027. The cubic root of 77028479 is about 425.4845297452.

The spelling of 77028479 in words is "seventy-seven million, twenty-eight thousand, four hundred seventy-nine".