1398879 has 24 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 852480.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398879 is 9788931.

1398879 = 59³ + 60³ + ... + 64³.

It is not a de Polignac number, because 1398879 - 2³ = 1398871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6162 + ... + 6384.

It is an arithmetic number, because the mean of its divisors is an integer number (91728).

2^1398879 is an apocalyptic number.

1398879 is a deficient number, since it is larger than the sum of its proper divisors (802593).

1398879 is a wasteful number, since it uses less digits than its factorization.

1398879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1398879 is about 1182.7421527958. The cubic root of 1398879 is about 111.8390278947.

The spelling of 1398879 in words is "one million, three hundred ninety-eight thousand, eight hundred seventy-nine".