774247680 has 288 divisors, whose sum is σ = 2816795520. Its totient is φ = 201277440.

The previous prime is 774247673. The next prime is 774247693. The reversal of 774247680 is 86742477.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1485820 + ... + 1486340.

It is an arithmetic number, because the mean of its divisors is an integer number (9780540).

Almost surely, 2^774247680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774247680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408397760).

774247680 is an abundant number, since it is smaller than the sum of its proper divisors (2042547840).

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

774247680 is a wasteful number, since it uses less digits than its factorization.

774247680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 774247680 is about 27825.3064673150. The cubic root of 774247680 is about 918.2479572834.

The spelling of 774247680 in words is "seven hundred seventy-four million, two hundred forty-seven thousand, six hundred eighty".