770371840 has 144 divisors (see below), whose sum is σ = 2128637952. Its totient is φ = 261660672.

The previous prime is 770371799. The next prime is 770371841. The reversal of 770371840 is 48173077.

It is a self number, because there is not a number n which added to its sum of digits gives 770371840.

It is not an unprimeable number, because it can be changed into a prime (770371841) 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, 1137582 + ... + 1138258.

It is an arithmetic number, because the mean of its divisors is an integer number (14782208).

Almost surely, 2^770371840 is an apocalyptic number.

770371840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064318976).

770371840 is an abundant number, since it is smaller than the sum of its proper divisors (1358266112).

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

770371840 is a wasteful number, since it uses less digits than its factorization.

770371840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 770371840 is about 27755.5731340572. The cubic root of 770371840 is about 916.7131609842.

The spelling of 770371840 in words is "seven hundred seventy million, three hundred seventy-one thousand, eight hundred forty".