778462464 has 144 divisors (see below), whose sum is σ = 2255856512. Its totient is φ = 236888064.

The previous prime is 778462429. The next prime is 778462469. The reversal of 778462464 is 464264877.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778462469) 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, 1027974 + ... + 1028730.

Almost surely, 2^778462464 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 778462464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127928256).

778462464 is an abundant number, since it is smaller than the sum of its proper divisors (1477394048).

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

778462464 is a wasteful number, since it uses less digits than its factorization.

778462464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 878 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 48.

The square root of 778462464 is about 27900.9401992119. The cubic root of 778462464 is about 919.9111697472.

The spelling of 778462464 in words is "seven hundred seventy-eight million, four hundred sixty-two thousand, four hundred sixty-four".