772668828 has 48 divisors (see below), whose sum is σ = 2021967360. Its totient is φ = 255145392.

The previous prime is 772668823. The next prime is 772668833. The reversal of 772668828 is 828866277.

It is an interprime number because it is at equal distance from previous prime (772668823) and next prime (772668833).

It is a super-3 number, since 3×772668828³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772668823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21876 + ... + 44987.

It is an arithmetic number, because the mean of its divisors is an integer number (42124320).

Almost surely, 2^772668828 is an apocalyptic number.

It is an amenable number.

772668828 is an abundant number, since it is smaller than the sum of its proper divisors (1249298532).

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

772668828 is a wasteful number, since it uses less digits than its factorization.

772668828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66983 (or 66975 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 772668828 is about 27796.9211964203. The cubic root of 772668828 is about 917.6233663653.

The spelling of 772668828 in words is "seven hundred seventy-two million, six hundred sixty-eight thousand, eight hundred twenty-eight".