1398290 has 16 divisors (see below), whose sum is σ = 2555712. Its totient is φ = 550704.

The previous prime is 1398289. The next prime is 1398307. The reversal of 1398290 is 928931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (159732).

2^1398290 is an apocalyptic number.

1398290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398290 is a deficient number, since it is larger than the sum of its proper divisors (1157422).

1398290 is a wasteful number, since it uses less digits than its factorization.

1398290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1398290 is about 1182.4931289441. The cubic root of 1398290 is about 111.8233290304.

The spelling of 1398290 in words is "one million, three hundred ninety-eight thousand, two hundred ninety".