772408690 has 8 divisors (see below), whose sum is σ = 1390335660. Its totient is φ = 308963472.

The previous prime is 772408673. The next prime is 772408709. The reversal of 772408690 is 96804277.

It can be written as a sum of positive squares in 2 ways, for example, as 680114241 + 92294449 = 26079^2 + 9607^2 .

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

It is a super-2 number, since 2×772408690² = 1193230368775032200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38620425 + ... + 38620444.

Almost surely, 2^772408690 is an apocalyptic number.

772408690 is a deficient number, since it is larger than the sum of its proper divisors (617926970).

772408690 is a wasteful number, since it uses less digits than its factorization.

772408690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77240876.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 772408690 is about 27792.2415432797. The cubic root of 772408690 is about 917.5203746339.

The spelling of 772408690 in words is "seven hundred seventy-two million, four hundred eight thousand, six hundred ninety".