1787229138 has 16 divisors (see below), whose sum is σ = 3609850176. Its totient is φ = 589844400.

The previous prime is 1787229137. The next prime is 1787229163. The reversal of 1787229138 is 8319227871.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1787229133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474006 + ... + 1475217.

It is an arithmetic number, because the mean of its divisors is an integer number (225615636).

Almost surely, 2^1787229138 is an apocalyptic number.

1787229138 is an abundant number, since it is smaller than the sum of its proper divisors (1822621038).

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

1787229138 is a wasteful number, since it uses less digits than its factorization.

1787229138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949329.

The product of its digits is 338688, while the sum is 48.

The square root of 1787229138 is about 42275.6329106969. The cubic root of 1787229138 is about 1213.5567180347.

The spelling of 1787229138 in words is "one billion, seven hundred eighty-seven million, two hundred twenty-nine thousand, one hundred thirty-eight".