23685144 has 32 divisors (see below), whose sum is σ = 67672320. Its totient is φ = 6767136.

The previous prime is 23685121. The next prime is 23685157. The reversal of 23685144 is 44158632.

Added to its reverse (44158632) it gives a triangular number (67843776 = T₁₁₆₄₈).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70324 + ... + 70659.

It is an arithmetic number, because the mean of its divisors is an integer number (2114760).

Almost surely, 2^23685144 is an apocalyptic number.

23685144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

23685144 is an abundant number, since it is smaller than the sum of its proper divisors (43987176).

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

23685144 is a wasteful number, since it uses less digits than its factorization.

23685144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140999 (or 140995 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 23685144 is about 4866.7385382821. The cubic root of 23685144 is about 287.1829659644.

Adding to 23685144 its reverse (44158632), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 23685144 in words is "twenty-three million, six hundred eighty-five thousand, one hundred forty-four".