2399964 has 24 divisors (see below), whose sum is σ = 6400128. Its totient is φ = 685680.

The previous prime is 2399951. The next prime is 2399977. The reversal of 2399964 is 4699932.

It is an interprime number because it is at equal distance from previous prime (2399951) and next prime (2399977).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 14202 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (266672).

2^2399964 is an apocalyptic number.

It is an amenable number.

2399964 is an abundant number, since it is smaller than the sum of its proper divisors (4000164).

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

2399964 is a wasteful number, since it uses less digits than its factorization.

2399964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28585 (or 28583 counting only the distinct ones).

The product of its digits is 104976, while the sum is 42.

The square root of 2399964 is about 1549.1817194894. The cubic root of 2399964 is about 133.8859205801.

Subtracting 2399964 from its reverse (4699932), we obtain a cube (2299968 = 132³).

The spelling of 2399964 in words is "two million, three hundred ninety-nine thousand, nine hundred sixty-four".