1390488 has 64 divisors (see below), whose sum is σ = 3974400. Its totient is φ = 401280.

The previous prime is 1390483. The next prime is 1390489. The reversal of 1390488 is 8840931.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390483) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 5958 + ... + 6186.

It is an arithmetic number, because the mean of its divisors is an integer number (62100).

2^1390488 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 1390488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987200).

1390488 is an abundant number, since it is smaller than the sum of its proper divisors (2583912).

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

1390488 is a wasteful number, since it uses less digits than its factorization.

1390488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1390488 is about 1179.1895521925. The cubic root of 1390488 is about 111.6149618306.

The spelling of 1390488 in words is "one million, three hundred ninety thousand, four hundred eighty-eight".