426540440 has 32 divisors (see below), whose sum is σ = 985657680. Its totient is φ = 166004352.

The previous prime is 426540431. The next prime is 426540467. The reversal of 426540440 is 44045624.

It is a happy number.

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, 142622 + ... + 145581.

Almost surely, 2^426540440 is an apocalyptic number.

426540440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

426540440 is an abundant number, since it is smaller than the sum of its proper divisors (559117240).

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

426540440 is a wasteful number, since it uses less digits than its factorization.

426540440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288251 (or 288247 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 426540440 is about 20652.8554926431. The cubic root of 426540440 is about 752.7545758818.

The spelling of 426540440 in words is "four hundred twenty-six million, five hundred forty thousand, four hundred forty".