1864406 has 4 divisors (see below), whose sum is σ = 2796612. Its totient is φ = 932202.

The previous prime is 1864399. The next prime is 1864417. The reversal of 1864406 is 6044681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6044681 = 151 ⋅40031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 466100 + ... + 466103.

It is an arithmetic number, because the mean of its divisors is an integer number (699153).

2^1864406 is an apocalyptic number.

1864406 is a deficient number, since it is larger than the sum of its proper divisors (932206).

1864406 is an equidigital number, since it uses as much as digits as its factorization.

1864406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932205.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1864406 is about 1365.4325322036. The cubic root of 1864406 is about 123.0779244911.

The spelling of 1864406 in words is "one million, eight hundred sixty-four thousand, four hundred six".