770681340 has 288 divisors, whose sum is σ = 2788531200. Its totient is φ = 169827840.

The previous prime is 770681323. The next prime is 770681407. The reversal of 770681340 is 43186077.

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 = 770681295 and 770681304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2033271 + ... + 2033649.

It is an arithmetic number, because the mean of its divisors is an integer number (9682400).

Almost surely, 2^770681340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770681340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394265600).

770681340 is an abundant number, since it is smaller than the sum of its proper divisors (2017849860).

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

770681340 is a wasteful number, since it uses less digits than its factorization.

770681340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 770681340 is about 27761.1480310163. The cubic root of 770681340 is about 916.8359089532.

The spelling of 770681340 in words is "seven hundred seventy million, six hundred eighty-one thousand, three hundred forty".