774500640 has 48 divisors (see below), whose sum is σ = 2439678528. Its totient is φ = 206533376.

The previous prime is 774500627. The next prime is 774500641. The reversal of 774500640 is 46005477.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (774500641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806292 + ... + 807251.

It is an arithmetic number, because the mean of its divisors is an integer number (50826636).

Almost surely, 2^774500640 is an apocalyptic number.

It is an amenable number.

774500640 is an abundant number, since it is smaller than the sum of its proper divisors (1665177888).

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

774500640 is a wasteful number, since it uses less digits than its factorization.

774500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613561 (or 1613553 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 774500640 is about 27829.8515985982. The cubic root of 774500640 is about 918.3479488482.

The spelling of 774500640 in words is "seven hundred seventy-four million, five hundred thousand, six hundred forty".