774740720 has 80 divisors (see below), whose sum is σ = 1945000512. Its totient is φ = 285296640.

The previous prime is 774740699. The next prime is 774740731. The reversal of 774740720 is 27047477.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×774740720² = 1200446366452236800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522380 + ... + 523860.

Almost surely, 2^774740720 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 774740720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972500256).

774740720 is an abundant number, since it is smaller than the sum of its proper divisors (1170259792).

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

774740720 is a wasteful number, since it uses less digits than its factorization.

774740720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 774740720 is about 27834.1646183247. The cubic root of 774740720 is about 918.4428289929.

The spelling of 774740720 in words is "seven hundred seventy-four million, seven hundred forty thousand, seven hundred twenty".