1390897963728 has 240 divisors, whose sum is σ = 4810927080960. Its totient is φ = 365294555136.

The previous prime is 1390897963727. The next prime is 1390897963747. The reversal of 1390897963728 is 8273697980931.

1390897963728 is a `hidden beast` number, since 1 + 3 + 90 + 89 + 7 + 96 + 372 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390897963727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2909800 + ... + 3353912.

It is an arithmetic number, because the mean of its divisors is an integer number (20045529504).

Almost surely, 2^{1390897963728} is an apocalyptic number.

1390897963728 is a gapful number since it is divisible by the number (18) 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 1390897963728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405463540480).

1390897963728 is an abundant number, since it is smaller than the sum of its proper divisors (3420029117232).

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

1390897963728 is a wasteful number, since it uses less digits than its factorization.

1390897963728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444386 (or 444377 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 72.

The spelling of 1390897963728 in words is "one trillion, three hundred ninety billion, eight hundred ninety-seven million, nine hundred sixty-three thousand, seven hundred twenty-eight".