1398402 has 12 divisors (see below), whose sum is σ = 3029910. Its totient is φ = 466128.

The previous prime is 1398401. The next prime is 1398407. The reversal of 1398402 is 2048931.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 314721 = 1041^2 + 561^2 .

It is not an unprimeable number, because it can be changed into a prime (1398401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38827 + ... + 38862.

2^1398402 is an apocalyptic number.

1398402 is an abundant number, since it is smaller than the sum of its proper divisors (1631508).

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

1398402 is a wasteful number, since it uses less digits than its factorization.

1398402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77697 (or 77694 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1398402 is about 1182.5404855649. The cubic root of 1398402 is about 111.8263145528.

The spelling of 1398402 in words is "one million, three hundred ninety-eight thousand, four hundred two".