13871990 has 32 divisors (see below), whose sum is σ = 28429056. Its totient is φ = 4824160.

The previous prime is 13871989. The next prime is 13871999. The reversal of 13871990 is 9917831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212 + ... + 5271.

It is an arithmetic number, because the mean of its divisors is an integer number (888408).

Almost surely, 2^13871990 is an apocalyptic number.

13871990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13871990 is an abundant number, since it is smaller than the sum of its proper divisors (14557066).

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

13871990 is a wasteful number, since it uses less digits than its factorization.

13871990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13871990 is about 3724.5120485776. The cubic root of 13871990 is about 240.2773991577.

The spelling of 13871990 in words is "thirteen million, eight hundred seventy-one thousand, nine hundred ninety".