1340997828 has 48 divisors (see below), whose sum is σ = 3209887296. Its totient is φ = 435496320.

The previous prime is 1340997817. The next prime is 1340997841. The reversal of 1340997828 is 8287990431.

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, 214150 + ... + 220322.

It is an arithmetic number, because the mean of its divisors is an integer number (66872652).

Almost surely, 2^1340997828 is an apocalyptic number.

It is an amenable number.

1340997828 is an abundant number, since it is smaller than the sum of its proper divisors (1868889468).

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

1340997828 is a wasteful number, since it uses less digits than its factorization.

1340997828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6644 (or 6642 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1340997828 is about 36619.6371909936. The cubic root of 1340997828 is about 1102.7473550950.

The spelling of 1340997828 in words is "one billion, three hundred forty million, nine hundred ninety-seven thousand, eight hundred twenty-eight".