770628640 has 48 divisors (see below), whose sum is σ = 1847809152. Its totient is φ = 303646464.

The previous prime is 770628631. The next prime is 770628641. The reversal of 770628640 is 46826077.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 770628593 and 770628602.

It is not an unprimeable number, because it can be changed into a prime (770628641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25224 + ... + 46663.

It is an arithmetic number, because the mean of its divisors is an integer number (38496024).

Almost surely, 2^770628640 is an apocalyptic number.

It is an amenable number.

770628640 is an abundant number, since it is smaller than the sum of its proper divisors (1077180512).

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

770628640 is a wasteful number, since it uses less digits than its factorization.

770628640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71969 (or 71961 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 770628640 is about 27760.1988465501. The cubic root of 770628640 is about 916.8150104092.

The spelling of 770628640 in words is "seven hundred seventy million, six hundred twenty-eight thousand, six hundred forty".