1398898 has 4 divisors (see below), whose sum is σ = 2098350. Its totient is φ = 699448.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398898 is 8988931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 840889 + 558009 = 917^2 + 747^2 .

It is a super-2 number, since 2×1398898² = 3913831228808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349723 + ... + 349726.

2^1398898 is an apocalyptic number.

1398898 is a deficient number, since it is larger than the sum of its proper divisors (699452).

1398898 is an equidigital number, since it uses as much as digits as its factorization.

1398898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699451.

The product of its digits is 124416, while the sum is 46.

The square root of 1398898 is about 1182.7501849503. The cubic root of 1398898 is about 111.8395342363.

The spelling of 1398898 in words is "one million, three hundred ninety-eight thousand, eight hundred ninety-eight".