1390421533698 has 54 divisors (see below), whose sum is σ = 3024190058409. Its totient is φ = 461694530304.

The previous prime is 1390421533691. The next prime is 1390421533729. The reversal of 1390421533698 is 8963351240931.

1390421533698 is a `hidden beast` number, since 1 + 3 + 9 + 0 + 4 + 215 + 336 + 98 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1373037902289 + 17383631409 = 1171767^2 + 131847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=833793.

It is not an unprimeable number, because it can be changed into a prime (1390421533691) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2246238033 + ... + 2246238651.

Almost surely, 2^{1390421533698} is an apocalyptic number.

1390421533698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1390421533698 is an abundant number, since it is smaller than the sum of its proper divisors (1633768524711).

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

1390421533698 is an frugal number, since it uses more digits than its factorization.

1390421533698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 1390421533698 in words is "one trillion, three hundred ninety billion, four hundred twenty-one million, five hundred thirty-three thousand, six hundred ninety-eight".