1002428440 has 64 divisors (see below), whose sum is σ = 2432979360. Its totient is φ = 369515520.

The previous prime is 1002428437. The next prime is 1002428459. The reversal of 1002428440 is 448242001.

It is a congruent number.

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, 420532 + ... + 422908.

Almost surely, 2^1002428440 is an apocalyptic number.

1002428440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002428440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216489680).

1002428440 is an abundant number, since it is smaller than the sum of its proper divisors (1430550920).

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

1002428440 is a wasteful number, since it uses less digits than its factorization.

1002428440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 1002428440 is about 31661.1503265437. The cubic root of 1002428440 is about 1000.8088256247.

The spelling of 1002428440 in words is "one billion, two million, four hundred twenty-eight thousand, four hundred forty".