851851420 has 24 divisors (see below), whose sum is σ = 2044443744. Its totient is φ = 292063296.

The previous prime is 851851409. The next prime is 851851463. The reversal of 851851420 is 24158158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3042187 + ... + 3042466.

It is an arithmetic number, because the mean of its divisors is an integer number (85185156).

Almost surely, 2^851851420 is an apocalyptic number.

It is an amenable number.

851851420 is an abundant number, since it is smaller than the sum of its proper divisors (1192592324).

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

851851420 is a wasteful number, since it uses less digits than its factorization.

851851420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084669 (or 6084667 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 851851420 is about 29186.4937942193. The cubic root of 851851420 is about 947.9554997597.

The spelling of 851851420 in words is "eight hundred fifty-one million, eight hundred fifty-one thousand, four hundred twenty".