1398638989474 has 8 divisors (see below), whose sum is σ = 2124514920960. Its totient is φ = 690467349156.

The previous prime is 1398638989421. The next prime is 1398638989477. The reversal of 1398638989474 is 4749898368931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is a junction number, because it is equal to n+sod(n) for n = 1398638989394 and 1398638989403.

It is not an unprimeable number, because it can be changed into a prime (1398638989477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4426072594 + ... + 4426072909.

It is an arithmetic number, because the mean of its divisors is an integer number (265564365120).

Almost surely, 2^{1398638989474} is an apocalyptic number.

1398638989474 is a deficient number, since it is larger than the sum of its proper divisors (725875931486).

1398638989474 is an equidigital number, since it uses as much as digits as its factorization.

1398638989474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8852145584.

The product of its digits is 2257403904, while the sum is 79.

The spelling of 1398638989474 in words is "one trillion, three hundred ninety-eight billion, six hundred thirty-eight million, nine hundred eighty-nine thousand, four hundred seventy-four".