1864281366 has 32 divisors (see below), whose sum is σ = 4158280800. Its totient is φ = 619112160.

The previous prime is 1864281283. The next prime is 1864281401. The reversal of 1864281366 is 6631824681.

1864281366 is a `hidden beast` number, since 1 + 8 + 6 + 4 + 281 + 366 = 666.

It is a super-2 number, since 2×1864281366² = 6951090023229651912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49645 + ... + 78696.

It is an arithmetic number, because the mean of its divisors is an integer number (129946275).

Almost surely, 2^1864281366 is an apocalyptic number.

1864281366 is an abundant number, since it is smaller than the sum of its proper divisors (2293999434).

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

1864281366 is a wasteful number, since it uses less digits than its factorization.

1864281366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128621 (or 128615 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1864281366 is about 43177.3246739536. The cubic root of 1864281366 is about 1230.7518187743.

The spelling of 1864281366 in words is "one billion, eight hundred sixty-four million, two hundred eighty-one thousand, three hundred sixty-six".