1864386 has 12 divisors (see below), whose sum is σ = 4039542. Its totient is φ = 621456.

The previous prime is 1864363. The next prime is 1864391. The reversal of 1864386 is 6834681.

It is a happy number.

1864386 is a `hidden beast` number, since 1 + 8 + 643 + 8 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 585225 = 1131^2 + 765^2 .

It is a super-3 number, since 3×1864386³ = 19441454530833433368, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1864386.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51771 + ... + 51806.

2^1864386 is an apocalyptic number.

1864386 is an abundant number, since it is smaller than the sum of its proper divisors (2175156).

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

1864386 is a wasteful number, since it uses less digits than its factorization.

1864386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103585 (or 103582 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1864386 is about 1365.4252084973. The cubic root of 1864386 is about 123.0774843925.

The spelling of 1864386 in words is "one million, eight hundred sixty-four thousand, three hundred eighty-six".