13661730 has 32 divisors (see below), whose sum is σ = 36432000. Its totient is φ = 3643056.

The previous prime is 13661689. The next prime is 13661759. The reversal of 13661730 is 3716631.

13661730 is a `hidden beast` number, since 13 + 6 + 617 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13661694 and 13661703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25030 + ... + 25569.

It is an arithmetic number, because the mean of its divisors is an integer number (1138500).

Almost surely, 2^13661730 is an apocalyptic number.

13661730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13661730 is an abundant number, since it is smaller than the sum of its proper divisors (22770270).

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

13661730 is a wasteful number, since it uses less digits than its factorization.

13661730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50615 (or 50609 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 13661730 is about 3696.1777554658. The cubic root of 13661730 is about 239.0572390230.

The spelling of 13661730 in words is "thirteen million, six hundred sixty-one thousand, seven hundred thirty".