784572420 has 48 divisors (see below), whose sum is σ = 2256182208. Its totient is φ = 203564160.

The previous prime is 784572413. The next prime is 784572421. The reversal of 784572420 is 24275487.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (784572421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174486 + ... + 178925.

It is an arithmetic number, because the mean of its divisors is an integer number (47003796).

Almost surely, 2^784572420 is an apocalyptic number.

It is an amenable number.

784572420 is an abundant number, since it is smaller than the sum of its proper divisors (1471609788).

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

784572420 is a wasteful number, since it uses less digits than its factorization.

784572420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353460 (or 353458 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 784572420 is about 28010.2199205933. The cubic root of 784572420 is about 922.3116175875.

The spelling of 784572420 in words is "seven hundred eighty-four million, five hundred seventy-two thousand, four hundred twenty".