13499990 has 24 divisors (see below), whose sum is σ = 28268352. Its totient is φ = 4628400.

The previous prime is 13499939. The next prime is 13499999. The reversal of 13499990 is 9999431.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13499999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13286 + ... + 14265.

It is an arithmetic number, because the mean of its divisors is an integer number (1177848).

Almost surely, 2^13499990 is an apocalyptic number.

13499990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13499990 is an abundant number, since it is smaller than the sum of its proper divisors (14768362).

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

13499990 is a wasteful number, since it uses less digits than its factorization.

13499990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27572 (or 27565 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 13499990 is about 3674.2332533469. The cubic root of 13499990 is about 238.1100990026.

The spelling of 13499990 in words is "thirteen million, four hundred ninety-nine thousand, nine hundred ninety".