778506432 has 112 divisors (see below), whose sum is σ = 2379341952. Its totient is φ = 222023680.

The previous prime is 778506431. The next prime is 778506467. The reversal of 778506432 is 234605877.

It is not an unprimeable number, because it can be changed into a prime (778506431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25063 + ... + 46745.

Almost surely, 2^778506432 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 778506432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189670976).

778506432 is an abundant number, since it is smaller than the sum of its proper divisors (1600835520).

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

778506432 is a wasteful number, since it uses less digits than its factorization.

778506432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21726 (or 21716 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 778506432 is about 27901.7281185234. The cubic root of 778506432 is about 919.9284884554.

The spelling of 778506432 in words is "seven hundred seventy-eight million, five hundred six thousand, four hundred thirty-two".