1397931524420 has 24 divisors (see below), whose sum is σ = 2968641106200. Its totient is φ = 552889770752.

The previous prime is 1397931524419. The next prime is 1397931524491. The reversal of 1397931524420 is 244251397931.

It can be written as a sum of positive squares in 4 ways, for example, as 3208316164 + 1394723208256 = 56642^2 + 1180984^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392675615 + ... + 392679174.

It is an arithmetic number, because the mean of its divisors is an integer number (123693379425).

Almost surely, 2^{1397931524420} is an apocalyptic number.

1397931524420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397931524420 is an abundant number, since it is smaller than the sum of its proper divisors (1570709581780).

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

1397931524420 is a wasteful number, since it uses less digits than its factorization.

1397931524420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785354887 (or 785354885 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 1397931524420 in words is "one trillion, three hundred ninety-seven billion, nine hundred thirty-one million, five hundred twenty-four thousand, four hundred twenty".