1390264 has 8 divisors (see below), whose sum is σ = 2606760. Its totient is φ = 695128.

The previous prime is 1390253. The next prime is 1390283. The reversal of 1390264 is 4620931.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86884 + ... + 86899.

It is an arithmetic number, because the mean of its divisors is an integer number (325845).

2^1390264 is an apocalyptic number.

It is an amenable number.

1390264 is a deficient number, since it is larger than the sum of its proper divisors (1216496).

1390264 is a wasteful number, since it uses less digits than its factorization.

1390264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173789 (or 173785 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1390264 is about 1179.0945678783. The cubic root of 1390264 is about 111.6089679890.

The spelling of 1390264 in words is "one million, three hundred ninety thousand, two hundred sixty-four".