13487990 has 16 divisors (see below), whose sum is σ = 24690960. Its totient is φ = 5303520.

The previous prime is 13487983. The next prime is 13487993. The reversal of 13487990 is 9978431.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487993) 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, 10841 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (1543185).

Almost surely, 2^13487990 is an apocalyptic number.

13487990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13487990 is a deficient number, since it is larger than the sum of its proper divisors (11202970).

13487990 is a wasteful number, since it uses less digits than its factorization.

13487990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22927.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 13487990 is about 3672.5998965311. The cubic root of 13487990 is about 238.0395268955.

The spelling of 13487990 in words is "thirteen million, four hundred eighty-seven thousand, nine hundred ninety".