778730472 has 96 divisors (see below), whose sum is σ = 2289530880. Its totient is φ = 237686400.

The previous prime is 778730443. The next prime is 778730483. The reversal of 778730472 is 274037877.

778730472 is a `hidden beast` number, since 77 + 87 + 30 + 472 = 666.

It is a super-2 number, since 2×778730472² = 1212842296042685568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115597 + ... + 122147.

It is an arithmetic number, because the mean of its divisors is an integer number (23849280).

Almost surely, 2^778730472 is an apocalyptic number.

778730472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778730472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144765440).

778730472 is an abundant number, since it is smaller than the sum of its proper divisors (1510800408).

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

778730472 is a wasteful number, since it uses less digits than its factorization.

778730472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 45.

The square root of 778730472 is about 27905.7426348055. The cubic root of 778730472 is about 920.0167262239.

The spelling of 778730472 in words is "seven hundred seventy-eight million, seven hundred thirty thousand, four hundred seventy-two".