774343640 has 32 divisors (see below), whose sum is σ = 1991170080. Its totient is φ = 265489152.

The previous prime is 774343607. The next prime is 774343643. The reversal of 774343640 is 46343477.

It is a junction number, because it is equal to n+sod(n) for n = 774343594 and 774343603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774343643) 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, 1382477 + ... + 1383036.

It is an arithmetic number, because the mean of its divisors is an integer number (62224065).

Almost surely, 2^774343640 is an apocalyptic number.

774343640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

774343640 is an abundant number, since it is smaller than the sum of its proper divisors (1216826440).

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

774343640 is a wasteful number, since it uses less digits than its factorization.

774343640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765531 (or 2765527 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 38.

The square root of 774343640 is about 27827.0307435055. The cubic root of 774343640 is about 918.2858914984.

The spelling of 774343640 in words is "seven hundred seventy-four million, three hundred forty-three thousand, six hundred forty".