778572 has 48 divisors (see below), whose sum is σ = 2066400. Its totient is φ = 256608.

The previous prime is 778567. The next prime is 778579. The reversal of 778572 is 275877.

778572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (778579) 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, 8704 + ... + 8792.

It is an arithmetic number, because the mean of its divisors is an integer number (43050).

2⁷⁷⁸⁵⁷² 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 778572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1033200).

778572 is an abundant number, since it is smaller than the sum of its proper divisors (1287828).

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

778572 is an equidigital number, since it uses as much as digits as its factorization.

778572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 94 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 778572 is about 882.3672704719. The cubic root of 778572 is about 91.9954314051.

It can be divided in two parts, 77 and 8572, that added together give a square (8649 = 93²).

The spelling of 778572 in words is "seven hundred seventy-eight thousand, five hundred seventy-two".