2381656 has 8 divisors (see below), whose sum is σ = 4465620. Its totient is φ = 1190824.

The previous prime is 2381651. The next prime is 2381657. The reversal of 2381656 is 6561832.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148846 + ... + 148861.

2^2381656 is an apocalyptic number.

It is an amenable number.

2381656 is a deficient number, since it is larger than the sum of its proper divisors (2083964).

2381656 is a wasteful number, since it uses less digits than its factorization.

2381656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297713 (or 297709 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 2381656 is about 1543.2614814088. The cubic root of 2381656 is about 133.5446039475.

The spelling of 2381656 in words is "two million, three hundred eighty-one thousand, six hundred fifty-six".