77428967 has 12 divisors (see below), whose sum is σ = 98259336. Its totient is φ = 60333840.

The previous prime is 77428943. The next prime is 77428969. The reversal of 77428967 is 76982477.

It is not a de Polignac number, because 77428967 - 2⁶ = 77428903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77428969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71288 + ... + 72365.

It is an arithmetic number, because the mean of its divisors is an integer number (8188278).

Almost surely, 2^77428967 is an apocalyptic number.

77428967 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

77428967 is a deficient number, since it is larger than the sum of its proper divisors (20830369).

77428967 is a wasteful number, since it uses less digits than its factorization.

77428967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143678 (or 143671 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 77428967 is about 8799.3731026704. The cubic root of 77428967 is about 426.2206513391.

The spelling of 77428967 in words is "seventy-seven million, four hundred twenty-eight thousand, nine hundred sixty-seven".