1390432 has 12 divisors (see below), whose sum is σ = 2737476. Its totient is φ = 695200.

The previous prime is 1390421. The next prime is 1390457. The reversal of 1390432 is 2340931.

It is a super-2 number, since 2×1390432² = 3866602293248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21694 + ... + 21757.

It is an arithmetic number, because the mean of its divisors is an integer number (228123).

2^1390432 is an apocalyptic number.

It is an amenable number.

1390432 is a deficient number, since it is larger than the sum of its proper divisors (1347044).

1390432 is an equidigital number, since it uses as much as digits as its factorization.

1390432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43461 (or 43453 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1390432 is about 1179.1658068313. The cubic root of 1390432 is about 111.6134634305.

The spelling of 1390432 in words is "one million, three hundred ninety thousand, four hundred thirty-two".