1398280 has 32 divisors (see below), whose sum is σ = 3389400. Its totient is φ = 516096.

The previous prime is 1398269. The next prime is 1398281. The reversal of 1398280 is 828931.

It can be written as a sum of positive squares in 4 ways, for example, as 465124 + 933156 = 682^2 + 966^2 .

It is not an unprimeable number, because it can be changed into a prime (1398281) 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, 825 + ... + 1864.

2^1398280 is an apocalyptic number.

1398280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398280 is an abundant number, since it is smaller than the sum of its proper divisors (1991120).

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

1398280 is a wasteful number, since it uses less digits than its factorization.

1398280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1398280 is about 1182.4889005822. The cubic root of 1398280 is about 111.8230624581.

The spelling of 1398280 in words is "one million, three hundred ninety-eight thousand, two hundred eighty".