1398860 has 24 divisors (see below), whose sum is σ = 3066336. Its totient is φ = 535040.

The previous prime is 1398847. The next prime is 1398863. The reversal of 1398860 is 688931.

It is a self number, because there is not a number n which added to its sum of digits gives 1398860.

It is not an unprimeable number, because it can be changed into a prime (1398863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (127764).

2^1398860 is an apocalyptic number.

1398860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398860 is an abundant number, since it is smaller than the sum of its proper divisors (1667476).

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

1398860 is a wasteful number, since it uses less digits than its factorization.

1398860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1398860 is about 1182.7341205867. The cubic root of 1398860 is about 111.8385215485.

The spelling of 1398860 in words is "one million, three hundred ninety-eight thousand, eight hundred sixty".