770690 has 8 divisors (see below), whose sum is σ = 1387260. Its totient is φ = 308272.

The previous prime is 770669. The next prime is 770741. The reversal of 770690 is 96077.

It can be written as a sum of positive squares in 2 ways, for example, as 744769 + 25921 = 863^2 + 161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×770690² = 1187926152200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

770690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38525 + ... + 38544.

2⁷⁷⁰⁶⁹⁰ is an apocalyptic number.

770690 is a deficient number, since it is larger than the sum of its proper divisors (616570).

770690 is a wasteful number, since it uses less digits than its factorization.

770690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77076.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 770690 is about 877.8895146885. The cubic root of 770690 is about 91.6839343044.

Subtracting from 770690 its sum of digits (29), we obtain a triangular number (770661 = T₁₂₄₁).

The spelling of 770690 in words is "seven hundred seventy thousand, six hundred ninety".