428389233240 has 64 divisors (see below), whose sum is σ = 1285524315360. Its totient is φ = 114205429760.

The previous prime is 428389233227. The next prime is 428389233247. The reversal of 428389233240 is 42332983824.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 428389233240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428389233247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59451 + ... + 927530.

Almost surely, 2^428389233240 is an apocalyptic number.

428389233240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428389233240 is an abundant number, since it is smaller than the sum of its proper divisors (857135082120).

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

428389233240 is a wasteful number, since it uses less digits than its factorization.

428389233240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990612 (or 990608 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 428389233240 in words is "four hundred twenty-eight billion, three hundred eighty-nine million, two hundred thirty-three thousand, two hundred forty".