1399488 has 56 divisors (see below), whose sum is σ = 3822192. Its totient is φ = 451584.

The previous prime is 1399477. The next prime is 1399493. The reversal of 1399488 is 8849931.

It is a Cunningham number, because it is equal to 1183²-1.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7006 + ... + 7202.

2^1399488 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 1399488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911096).

1399488 is an abundant number, since it is smaller than the sum of its proper divisors (2422704).

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

1399488 is a wasteful number, since it uses less digits than its factorization.

1399488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 239 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 1399488 is about 1182.9995773457. Note that the first 3 decimals coincide. The cubic root of 1399488 is about 111.8552551944.

The spelling of 1399488 in words is "one million, three hundred ninety-nine thousand, four hundred eighty-eight".