13898772 has 36 divisors (see below), whose sum is σ = 36347220. Its totient is φ = 4472832.

The previous prime is 13898771. The next prime is 13898779. The reversal of 13898772 is 27789831.

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 7817616 = 2466^2 + 2796^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13898771) 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, 5613 + ... + 7700.

It is an arithmetic number, because the mean of its divisors is an integer number (1009645).

Almost surely, 2^13898772 is an apocalyptic number.

13898772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13898772 is an abundant number, since it is smaller than the sum of its proper divisors (22448448).

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

13898772 is a wasteful number, since it uses less digits than its factorization.

13898772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352 (or 13347 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 13898772 is about 3728.1056851972. The cubic root of 13898772 is about 240.4319305171.

The spelling of 13898772 in words is "thirteen million, eight hundred ninety-eight thousand, seven hundred seventy-two".