428840424040 has 64 divisors (see below), whose sum is σ = 1102931660160. Its totient is φ = 147004450560.

The previous prime is 428840424029. The next prime is 428840424071. The reversal of 428840424040 is 40424048824.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 428840423984 and 428840424002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447375 + ... + 1718305.

It is an arithmetic number, because the mean of its divisors is an integer number (17233307190).

Almost surely, 2^428840424040 is an apocalyptic number.

428840424040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428840424040 is an abundant number, since it is smaller than the sum of its proper divisors (674091236120).

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

428840424040 is a wasteful number, since it uses less digits than its factorization.

428840424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276602 (or 276598 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 40.

The spelling of 428840424040 in words is "four hundred twenty-eight billion, eight hundred forty million, four hundred twenty-four thousand, forty".