1999227642 has 32 divisors (see below), whose sum is σ = 4272523200. Its totient is φ = 621451008.

The previous prime is 1999227613. The next prime is 1999227647. The reversal of 1999227642 is 2467229991.

It is a super-2 number, since 2×1999227642² = 7993822329073760328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

1999227642 is a modest number, since divided by 27642 gives 19992 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1999227647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78792 + ... + 101027.

It is an arithmetic number, because the mean of its divisors is an integer number (133516350).

Almost surely, 2^1999227642 is an apocalyptic number.

1999227642 is an abundant number, since it is smaller than the sum of its proper divisors (2273295558).

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

1999227642 is a wasteful number, since it uses less digits than its factorization.

1999227642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179950.

The product of its digits is 979776, while the sum is 51.

The square root of 1999227642 is about 44712.7234911943. The cubic root of 1999227642 is about 1259.7588439959.

The spelling of 1999227642 in words is "one billion, nine hundred ninety-nine million, two hundred twenty-seven thousand, six hundred forty-two".