15890140 has 24 divisors (see below), whose sum is σ = 38136672. Its totient is φ = 5448000.

The previous prime is 15890123. The next prime is 15890141. The reversal of 15890140 is 4109851.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 15890099 and 15890108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15890141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56611 + ... + 56890.

It is an arithmetic number, because the mean of its divisors is an integer number (1589028).

Almost surely, 2^15890140 is an apocalyptic number.

15890140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15890140 is an abundant number, since it is smaller than the sum of its proper divisors (22246532).

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

15890140 is a wasteful number, since it uses less digits than its factorization.

15890140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113517 (or 113515 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15890140 is about 3986.2438460285. The cubic root of 15890140 is about 251.4061560718.

Adding to 15890140 its reverse (4109851), we get a palindrome (19999991).

The spelling of 15890140 in words is "fifteen million, eight hundred ninety thousand, one hundred forty".