770661040 has 40 divisors (see below), whose sum is σ = 1794260160. Its totient is φ = 307838976.

The previous prime is 770661013. The next prime is 770661043. The reversal of 770661040 is 40166077.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 770660993 and 770661011.

It is not an unprimeable number, because it can be changed into a prime (770661043) 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, 55257 + ... + 67783.

It is an arithmetic number, because the mean of its divisors is an integer number (44856504).

Almost surely, 2^770661040 is an apocalyptic number.

It is an amenable number.

770661040 is an abundant number, since it is smaller than the sum of its proper divisors (1023599120).

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

770661040 is a wasteful number, since it uses less digits than its factorization.

770661040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309 (or 13303 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 770661040 is about 27760.7824097233. The cubic root of 770661040 is about 916.8278589628.

The spelling of 770661040 in words is "seven hundred seventy million, six hundred sixty-one thousand, forty".