770532840 has 648 divisors, whose sum is σ = 3379382370. Its totient is φ = 151683840.

The previous prime is 770532827. The next prime is 770532863. The reversal of 770532840 is 48235077.

It can be written as a sum of positive squares in only one way, i.e., 693479556 + 77053284 = 26334^2 + 8778^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 770532795 and 770532804.

It is an unprimeable number.

It is a polite number, since it can be written in 161 ways as a sum of consecutive naturals, for example, 40554351 + ... + 40554369.

Almost surely, 2^770532840 is an apocalyptic number.

770532840 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 770532840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689691185).

770532840 is an abundant number, since it is smaller than the sum of its proper divisors (2608849530).

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

770532840 is a wasteful number, since it uses less digits than its factorization.

770532840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 770532840 is about 27758.4733009580. The cubic root of 770532840 is about 916.7770178262. Note that the first 3 decimals are identical.

The spelling of 770532840 in words is "seven hundred seventy million, five hundred thirty-two thousand, eight hundred forty".