426521420 has 24 divisors (see below), whose sum is σ = 964595184. Its totient is φ = 157484736.

The previous prime is 426521413. The next prime is 426521461. The reversal of 426521420 is 24125624.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 426521420.

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, 819974 + ... + 820493.

It is an arithmetic number, because the mean of its divisors is an integer number (40191466).

Almost surely, 2^426521420 is an apocalyptic number.

It is an amenable number.

426521420 is an abundant number, since it is smaller than the sum of its proper divisors (538073764).

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

426521420 is a wasteful number, since it uses less digits than its factorization.

426521420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640489 (or 1640487 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 426521420 is about 20652.3950184960. The cubic root of 426521420 is about 752.7433869428.

The spelling of 426521420 in words is "four hundred twenty-six million, five hundred twenty-one thousand, four hundred twenty".