1864408 has 48 divisors (see below), whose sum is σ = 4348080. Its totient is φ = 733824.

The previous prime is 1864399. The next prime is 1864417. The reversal of 1864408 is 8044681.

It is an interprime number because it is at equal distance from previous prime (1864399) and next prime (1864417).

It is a self number, because there is not a number n which added to its sum of digits gives 1864408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9366 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (90585).

2^1864408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1864408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2174040).

1864408 is an abundant number, since it is smaller than the sum of its proper divisors (2483672).

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

1864408 is a wasteful number, since it uses less digits than its factorization.

1864408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1864408 is about 1365.4332645721. The cubic root of 1864408 is about 123.0779685007.

The spelling of 1864408 in words is "one million, eight hundred sixty-four thousand, four hundred eight".