13987974 has 128 divisors (see below), whose sum is σ = 40061952. Its totient is φ = 3133440.

The previous prime is 13987969. The next prime is 13987997. The reversal of 13987974 is 47978931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102034 + ... + 102170.

It is an arithmetic number, because the mean of its divisors is an integer number (312984).

Almost surely, 2^13987974 is an apocalyptic number.

13987974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13987974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20030976).

13987974 is an abundant number, since it is smaller than the sum of its proper divisors (26073978).

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

13987974 is a wasteful number, since it uses less digits than its factorization.

13987974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190.

The product of its digits is 381024, while the sum is 48.

The square root of 13987974 is about 3740.0499996658. The cubic root of 13987974 is about 240.9451962413.

The spelling of 13987974 in words is "thirteen million, nine hundred eighty-seven thousand, nine hundred seventy-four".