1397709798 has 16 divisors (see below), whose sum is σ = 2800271280. Its totient is φ = 465094656.

The previous prime is 1397709767. The next prime is 1397709827. The reversal of 1397709798 is 8979077931.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 198403 + ... + 205326.

It is an arithmetic number, because the mean of its divisors is an integer number (175016955).

Almost surely, 2^1397709798 is an apocalyptic number.

1397709798 is an abundant number, since it is smaller than the sum of its proper divisors (1402561482).

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

1397709798 is a wasteful number, since it uses less digits than its factorization.

1397709798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404311.

The product of its (nonzero) digits is 6001128, while the sum is 60.

The square root of 1397709798 is about 37385.9572299547. The cubic root of 1397709798 is about 1118.0786035196.

The spelling of 1397709798 in words is "one billion, three hundred ninety-seven million, seven hundred nine thousand, seven hundred ninety-eight".