766838820 has 48 divisors (see below), whose sum is σ = 2342346048. Its totient is φ = 185900160.

The previous prime is 766838713. The next prime is 766838843. The reversal of 766838820 is 28838667.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 766838820.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580279 + ... + 581598.

It is an arithmetic number, because the mean of its divisors is an integer number (48798876).

Almost surely, 2^766838820 is an apocalyptic number.

It is an amenable number.

766838820 is an abundant number, since it is smaller than the sum of its proper divisors (1575507228).

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

766838820 is a wasteful number, since it uses less digits than its factorization.

766838820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161900 (or 1161898 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 766838820 is about 27691.8547591164. The cubic root of 766838820 is about 915.3096267673.

The spelling of 766838820 in words is "seven hundred sixty-six million, eight hundred thirty-eight thousand, eight hundred twenty".