1399826596440 has 256 divisors, whose sum is σ = 4305135744000. Its totient is φ = 364035538944.

The previous prime is 1399826596433. The next prime is 1399826596457. The reversal of 1399826596440 is 446956289931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 345719536 + ... + 345723584.

It is an arithmetic number, because the mean of its divisors is an integer number (16816936500).

Almost surely, 2^{1399826596440} is an apocalyptic number.

1399826596440 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 1399826596440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152567872000).

1399826596440 is an abundant number, since it is smaller than the sum of its proper divisors (2905309147560).

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

1399826596440 is a wasteful number, since it uses less digits than its factorization.

1399826596440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586 (or 4582 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 66.

The spelling of 1399826596440 in words is "one trillion, three hundred ninety-nine billion, eight hundred twenty-six million, five hundred ninety-six thousand, four hundred forty".