1866538150 has 48 divisors (see below), whose sum is σ = 3659922000. Its totient is φ = 706268160.

The previous prime is 1866538147. The next prime is 1866538151. The reversal of 1866538150 is 518356681.

It is a junction number, because it is equal to n+sod(n) for n = 1866538097 and 1866538106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866538151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 995614 + ... + 997486.

It is an arithmetic number, because the mean of its divisors is an integer number (76248375).

Almost surely, 2^1866538150 is an apocalyptic number.

1866538150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866538150 is a deficient number, since it is larger than the sum of its proper divisors (1793383850).

1866538150 is a wasteful number, since it uses less digits than its factorization.

1866538150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953 (or 2948 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 1866538150 is about 43203.4506723711. The cubic root of 1866538150 is about 1231.2482425873.

The spelling of 1866538150 in words is "one billion, eight hundred sixty-six million, five hundred thirty-eight thousand, one hundred fifty".