1866229242 has 16 divisors (see below), whose sum is σ = 3793647072. Its totient is φ = 611878320.

The previous prime is 1866229241. The next prime is 1866229289. The reversal of 1866229242 is 2429226681.

It is a junction number, because it is equal to n+sod(n) for n = 1866229194 and 1866229203.

It is not an unprimeable number, because it can be changed into a prime (1866229241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2549128 + ... + 2549859.

It is an arithmetic number, because the mean of its divisors is an integer number (237102942).

Almost surely, 2^1866229242 is an apocalyptic number.

1866229242 is an abundant number, since it is smaller than the sum of its proper divisors (1927417830).

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

1866229242 is a wasteful number, since it uses less digits than its factorization.

1866229242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099053.

The product of its digits is 165888, while the sum is 42.

The square root of 1866229242 is about 43199.8754859317. The cubic root of 1866229242 is about 1231.1803158721.

The spelling of 1866229242 in words is "one billion, eight hundred sixty-six million, two hundred twenty-nine thousand, two hundred forty-two".