13705988 has 6 divisors (see below), whose sum is σ = 23985486. Its totient is φ = 6852992.

The previous prime is 13705963. The next prime is 13705997. The reversal of 13705988 is 88950731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12945604 + 760384 = 3598^2 + 872^2 .

It is a super-2 number, since 2×13705988² = 375708214112288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1713245 + ... + 1713252.

It is an arithmetic number, because the mean of its divisors is an integer number (3997581).

Almost surely, 2^13705988 is an apocalyptic number.

It is an amenable number.

13705988 is a deficient number, since it is larger than the sum of its proper divisors (10279498).

13705988 is a wasteful number, since it uses less digits than its factorization.

13705988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426501 (or 3426499 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 13705988 is about 3702.1599101065. The cubic root of 13705988 is about 239.3151075541.

The spelling of 13705988 in words is "thirteen million, seven hundred five thousand, nine hundred eighty-eight".