1390564 has 12 divisors (see below), whose sum is σ = 2781184. Its totient is φ = 595944.

The previous prime is 1390547. The next prime is 1390573. The reversal of 1390564 is 4650931.

1390564 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 49663 = 1390564 / (1 + 3 + 9 + 0 + 5 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24804 + ... + 24859.

2^1390564 is an apocalyptic number.

1390564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1390564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1390564 is a wasteful number, since it uses less digits than its factorization.

1390564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49674 (or 49672 counting only the distinct ones).

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

The square root of 1390564 is about 1179.2217772752. The cubic root of 1390564 is about 111.6169953091.

The spelling of 1390564 in words is "one million, three hundred ninety thousand, five hundred sixty-four".