13901990 has 8 divisors (see below), whose sum is σ = 25023600. Its totient is φ = 5560792.

The previous prime is 13901957. The next prime is 13901999. The reversal of 13901990 is 9910931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13901999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695090 + ... + 695109.

It is an arithmetic number, because the mean of its divisors is an integer number (3127950).

Almost surely, 2^13901990 is an apocalyptic number.

13901990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13901990 is a deficient number, since it is larger than the sum of its proper divisors (11121610).

13901990 is a wasteful number, since it uses less digits than its factorization.

13901990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390206.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 13901990 is about 3728.5372466961. The cubic root of 13901990 is about 240.4504849200.

The spelling of 13901990 in words is "thirteen million, nine hundred one thousand, nine hundred ninety".