780025828 has 12 divisors (see below), whose sum is σ = 1378561212. Its totient is φ = 386151200.

The previous prime is 780025801. The next prime is 780025879. The reversal of 780025828 is 828520087.

It can be written as a sum of positive squares in 2 ways, for example, as 319408384 + 460617444 = 17872^2 + 21462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964975 + ... + 965782.

It is an arithmetic number, because the mean of its divisors is an integer number (114880101).

Almost surely, 2^780025828 is an apocalyptic number.

It is an amenable number.

780025828 is a deficient number, since it is larger than the sum of its proper divisors (598535384).

780025828 is a wasteful number, since it uses less digits than its factorization.

780025828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930862 (or 1930860 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 780025828 is about 27928.9424790843. The cubic root of 780025828 is about 920.5265684376.

The spelling of 780025828 in words is "seven hundred eighty million, twenty-five thousand, eight hundred twenty-eight".