13771992 has 64 divisors (see below), whose sum is σ = 38112480. Its totient is φ = 4119552.

The previous prime is 13771973. The next prime is 13771999. The reversal of 13771992 is 29917731.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 13771992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13771999) 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, 10948 + ... + 12140.

Almost surely, 2^13771992 is an apocalyptic number.

13771992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13771992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19056240).

13771992 is an abundant number, since it is smaller than the sum of its proper divisors (24340488).

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

13771992 is a wasteful number, since it uses less digits than its factorization.

13771992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1248 counting only the distinct ones).

The product of its digits is 23814, while the sum is 39.

The square root of 13771992 is about 3711.0634594412. The cubic root of 13771992 is about 239.6986495524.

The spelling of 13771992 in words is "thirteen million, seven hundred seventy-one thousand, nine hundred ninety-two".