2389861 has 8 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 2206512.

The previous prime is 2389859. The next prime is 2389873. The reversal of 2389861 is 1689832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2389861 - 2¹ = 2389859 is a prime.

It is a super-2 number, since 2×2389861² = 11422871198642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2389861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125 + ... + 2458.

It is an arithmetic number, because the mean of its divisors is an integer number (322560).

2^2389861 is an apocalyptic number.

It is an amenable number.

2389861 is a deficient number, since it is larger than the sum of its proper divisors (190619).

2389861 is a wasteful number, since it uses less digits than its factorization.

2389861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 20736, while the sum is 37.

The square root of 2389861 is about 1545.9175269076. The cubic root of 2389861 is about 133.6977855406.

It can be divided in two parts, 23898 and 61, that multiplied together give a triangular number (1457778 = T₁₇₀₇).

The spelling of 2389861 in words is "two million, three hundred eighty-nine thousand, eight hundred sixty-one".