1397828053440 has 672 divisors, whose sum is σ = 6121556138880. Its totient is φ = 284754935808.

The previous prime is 1397828053379. The next prime is 1397828053511. The reversal of 1397828053440 is 443508287931.

It is a happy number.

1397828053440 is a `hidden beast` number, since 1 + 3 + 9 + 78 + 2 + 80 + 53 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7508362 + ... + 7692278.

It is an arithmetic number, because the mean of its divisors is an integer number (9109458540).

Almost surely, 2^{1397828053440} is an apocalyptic number.

1397828053440 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 1397828053440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3060778069440).

1397828053440 is an abundant number, since it is smaller than the sum of its proper divisors (4723728085440).

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

1397828053440 is a wasteful number, since it uses less digits than its factorization.

1397828053440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183989 (or 183976 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 1397828053440 in words is "one trillion, three hundred ninety-seven billion, eight hundred twenty-eight million, fifty-three thousand, four hundred forty".