1390464 has 96 divisors (see below), whose sum is σ = 4296240. Its totient is φ = 430080.

The previous prime is 1390457. The next prime is 1390469. The reversal of 1390464 is 4640931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19549 + ... + 19619.

2^1390464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148120).

1390464 is an abundant number, since it is smaller than the sum of its proper divisors (2905776).

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

1390464 is a wasteful number, since it uses less digits than its factorization.

1390464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1390464 is about 1179.1793756677. The cubic root of 1390464 is about 111.6143196641.

The spelling of 1390464 in words is "one million, three hundred ninety thousand, four hundred sixty-four".