1398840707 has 12 divisors (see below), whose sum is σ = 1541177400. Its totient is φ = 1268688960.

The previous prime is 1398840661. The next prime is 1398840719. The reversal of 1398840707 is 7070488931.

It is not a de Polignac number, because 1398840707 - 2¹⁶ = 1398775171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398840797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39044 + ... + 65742.

It is an arithmetic number, because the mean of its divisors is an integer number (128431450).

Almost surely, 2^1398840707 is an apocalyptic number.

1398840707 is a deficient number, since it is larger than the sum of its proper divisors (142336693).

1398840707 is a wasteful number, since it uses less digits than its factorization.

1398840707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27154 (or 27143 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1398840707 is about 37401.0789550248. The cubic root of 1398840707 is about 1118.3800738923.

The spelling of 1398840707 in words is "one billion, three hundred ninety-eight million, eight hundred forty thousand, seven hundred seven".