1398997031520 has 96 divisors (see below), whose sum is σ = 4807462544640. Its totient is φ = 339150794240.

The previous prime is 1398997031513. The next prime is 1398997031569. The reversal of 1398997031520 is 251307998931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132475500 + ... + 132486059.

It is an arithmetic number, because the mean of its divisors is an integer number (50077734840).

Almost surely, 2^{1398997031520} is an apocalyptic number.

1398997031520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398997031520 is an abundant number, since it is smaller than the sum of its proper divisors (3408465513120).

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

1398997031520 is a wasteful number, since it uses less digits than its factorization.

1398997031520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264961588 (or 264961580 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 57.

The spelling of 1398997031520 in words is "one trillion, three hundred ninety-eight billion, nine hundred ninety-seven million, thirty-one thousand, five hundred twenty".