1865894416 has 15 divisors (see below), whose sum is σ = 3615505231. Its totient is φ = 932860816.

The previous prime is 1865894383. The next prime is 1865894417. The reversal of 1865894416 is 6144985681.

The square root of 1865894416 is 43196.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1865894417) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 167385 + ... + 178183.

Almost surely, 2^1865894416 is an apocalyptic number.

1865894416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1865894416 is the 43196-th square number.

It is an amenable number.

1865894416 is a deficient number, since it is larger than the sum of its proper divisors (1749610815).

1865894416 is an frugal number, since it uses more digits than its factorization.

1865894416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21606 (or 10801 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The cubic root of 1865894416 is about 1231.1066815034.

The spelling of 1865894416 in words is "one billion, eight hundred sixty-five million, eight hundred ninety-four thousand, four hundred sixteen".