1398980 has 24 divisors (see below), whose sum is σ = 3205440. Its totient is φ = 508640.

The previous prime is 1398979. The next prime is 1398997. The reversal of 1398980 is 898931.

1398980 = 80² + 81² + ... + 167².

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, 2960 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (133560).

2^1398980 is an apocalyptic number.

1398980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398980 is an abundant number, since it is smaller than the sum of its proper divisors (1806460).

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

1398980 is a wasteful number, since it uses less digits than its factorization.

1398980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379 (or 6377 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1398980 is about 1182.7848494126. The cubic root of 1398980 is about 111.8417194475.

It can be divided in two parts, 139 and 8980, that added together give a palindrome (9119).

The spelling of 1398980 in words is "one million, three hundred ninety-eight thousand, nine hundred eighty".