1390879 has 16 divisors (see below), whose sum is σ = 1700352. Its totient is φ = 1111968.

The previous prime is 1390859. The next prime is 1390891. The reversal of 1390879 is 9780931.

It is a cyclic number.

It is not a de Polignac number, because 1390879 - 2⁵ = 1390847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8452 + ... + 8614.

It is an arithmetic number, because the mean of its divisors is an integer number (106272).

2^1390879 is an apocalyptic number.

1390879 is a deficient number, since it is larger than the sum of its proper divisors (309473).

1390879 is a wasteful number, since it uses less digits than its factorization.

1390879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1390879 is about 1179.3553323744. The cubic root of 1390879 is about 111.6254227527.

The spelling of 1390879 in words is "one million, three hundred ninety thousand, eight hundred seventy-nine".