1339440 has 40 divisors (see below), whose sum is σ = 4153008. Its totient is φ = 357120.

The previous prime is 1339433. The next prime is 1339463. The reversal of 1339440 is 449331.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1339440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 3030.

2^1339440 is an apocalyptic number.

1339440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1339440 is an abundant number, since it is smaller than the sum of its proper divisors (2813568).

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

1339440 is a wasteful number, since it uses less digits than its factorization.

1339440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5597 (or 5591 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1339440 is about 1157.3417818432. The cubic root of 1339440 is about 110.2320171615.

The spelling of 1339440 in words is "one million, three hundred thirty-nine thousand, four hundred forty".