1390456 has 8 divisors (see below), whose sum is σ = 2607120. Its totient is φ = 695224.

The previous prime is 1390421. The next prime is 1390457. The reversal of 1390456 is 6540931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86896 + ... + 86911.

It is an arithmetic number, because the mean of its divisors is an integer number (325890).

2^1390456 is an apocalyptic number.

It is an amenable number.

1390456 is a deficient number, since it is larger than the sum of its proper divisors (1216664).

1390456 is a wasteful number, since it uses less digits than its factorization.

1390456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173813 (or 173809 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1390456 is about 1179.1759834732. The cubic root of 1390456 is about 111.6141056069.

The spelling of 1390456 in words is "one million, three hundred ninety thousand, four hundred fifty-six".