1390442 has 16 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 657360.

The previous prime is 1390421. The next prime is 1390457. The reversal of 1390442 is 2440931.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7592 + ... + 7772.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^1390442 is an apocalyptic number.

1390442 is a deficient number, since it is larger than the sum of its proper divisors (811030).

1390442 is a wasteful number, since it uses less digits than its factorization.

1390442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1390442 is about 1179.1700471094. The cubic root of 1390442 is about 111.6137310049.

The spelling of 1390442 in words is "one million, three hundred ninety thousand, four hundred forty-two".