1139640 has 32 divisors (see below), whose sum is σ = 3419280. Its totient is φ = 303872.

The previous prime is 1139623. The next prime is 1139669. The reversal of 1139640 is 469311.

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 1139640.

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, 4629 + ... + 4868.

2^1139640 is an apocalyptic number.

1139640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139640 is an abundant number, since it is smaller than the sum of its proper divisors (2279640).

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

1139640 is a wasteful number, since it uses less digits than its factorization.

1139640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511 (or 9507 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1139640 is about 1067.5392264456. The cubic root of 1139640 is about 104.4533952727.

The spelling of 1139640 in words is "one million, one hundred thirty-nine thousand, six hundred forty".