1380402 has 20 divisors (see below), whose sum is σ = 3093486. Its totient is φ = 460080.

The previous prime is 1380397. The next prime is 1380419. The reversal of 1380402 is 2040831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 194481 = 1089^2 + 441^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4099 + ... + 4422.

2^1380402 is an apocalyptic number.

1380402 is an abundant number, since it is smaller than the sum of its proper divisors (1713084).

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

1380402 is an equidigital number, since it uses as much as digits as its factorization.

1380402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535 (or 8526 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1380402 is about 1174.9051025508. The cubic root of 1380402 is about 111.3444377592.

The spelling of 1380402 in words is "one million, three hundred eighty thousand, four hundred two".