851220402 has 32 divisors (see below), whose sum is σ = 1719353472. Its totient is φ = 280934784.

The previous prime is 851220401. The next prime is 851220449. The reversal of 851220402 is 204022158.

It is not an unprimeable number, because it can be changed into a prime (851220401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293403 + ... + 296289.

It is an arithmetic number, because the mean of its divisors is an integer number (53729796).

Almost surely, 2^851220402 is an apocalyptic number.

851220402 is an abundant number, since it is smaller than the sum of its proper divisors (868133070).

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

851220402 is a wasteful number, since it uses less digits than its factorization.

851220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 851220402 is about 29175.6816886941. The cubic root of 851220402 is about 947.7213725664.

The spelling of 851220402 in words is "eight hundred fifty-one million, two hundred twenty thousand, four hundred two".