840426252 has 24 divisors (see below), whose sum is σ = 1980413232. Its totient is φ = 277368000.

The previous prime is 840426239. The next prime is 840426269. The reversal of 840426252 is 252624048.

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, 345499 + ... + 347922.

It is an arithmetic number, because the mean of its divisors is an integer number (82517218).

Almost surely, 2^840426252 is an apocalyptic number.

It is an amenable number.

840426252 is an abundant number, since it is smaller than the sum of its proper divisors (1139986980).

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

840426252 is a wasteful number, since it uses less digits than its factorization.

840426252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693529 (or 693527 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 840426252 is about 28990.1061053595. The cubic root of 840426252 is about 943.6983664162.

The spelling of 840426252 in words is "eight hundred forty million, four hundred twenty-six thousand, two hundred fifty-two".