15801040 has 40 divisors (see below), whose sum is σ = 36926208. Its totient is φ = 6288000.

The previous prime is 15801017. The next prime is 15801043. The reversal of 15801040 is 4010851.

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 = 15800999 and 15801017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15801043) 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 7 ways as a sum of consecutive naturals, for example, 20665 + ... + 21415.

Almost surely, 2^15801040 is an apocalyptic number.

15801040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15801040 is an abundant number, since it is smaller than the sum of its proper divisors (21125168).

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

15801040 is a wasteful number, since it uses less digits than its factorization.

15801040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 15801040 is about 3975.0522009151. The cubic root of 15801040 is about 250.9353759228.

Adding to 15801040 its reverse (4010851), we get a palindrome (19811891).

The spelling of 15801040 in words is "fifteen million, eight hundred one thousand, forty".