1639120 has 40 divisors (see below), whose sum is σ = 4356864. Its totient is φ = 561792.

The previous prime is 1639097. The next prime is 1639147. The reversal of 1639120 is 219361.

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

It is a junction number, because it is equal to n+sod(n) for n = 1639091 and 1639100.

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, 904 + ... + 2023.

2^1639120 is an apocalyptic number.

1639120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1639120 is an abundant number, since it is smaller than the sum of its proper divisors (2717744).

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

1639120 is a wasteful number, since it uses less digits than its factorization.

1639120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947 (or 2941 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1639120 is about 1280.2812191077. The cubic root of 1639120 is about 117.9062743251.

The spelling of 1639120 in words is "one million, six hundred thirty-nine thousand, one hundred twenty".