772877889 has 32 divisors (see below), whose sum is σ = 1309921280. Its totient is φ = 441190800.

The previous prime is 772877887. The next prime is 772877909. The reversal of 772877889 is 988778277.

It is not a de Polignac number, because 772877889 - 2¹ = 772877887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772877881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288024 + ... + 290694.

It is an arithmetic number, because the mean of its divisors is an integer number (40935040).

Almost surely, 2^772877889 is an apocalyptic number.

It is an amenable number.

772877889 is a deficient number, since it is larger than the sum of its proper divisors (537043391).

772877889 is a wasteful number, since it uses less digits than its factorization.

772877889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218 (or 4212 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 63.

The square root of 772877889 is about 27800.6814484825. The cubic root of 772877889 is about 917.7061193518.

The spelling of 772877889 in words is "seven hundred seventy-two million, eight hundred seventy-seven thousand, eight hundred eighty-nine".