1904226987 has 48 divisors (see below), whose sum is σ = 2979529728. Its totient is φ = 1074098880.

The previous prime is 1904226953. The next prime is 1904226991. The reversal of 1904226987 is 7896224091.

It is not a de Polignac number, because 1904226987 - 2⁶ = 1904226923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1904226917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 434268 + ... + 438630.

It is an arithmetic number, because the mean of its divisors is an integer number (62073536).

Almost surely, 2^1904226987 is an apocalyptic number.

1904226987 is a deficient number, since it is larger than the sum of its proper divisors (1075302741).

1904226987 is a wasteful number, since it uses less digits than its factorization.

1904226987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1904226987 is about 43637.4493640497. The cubic root of 1904226987 is about 1239.4801382647.

The spelling of 1904226987 in words is "one billion, nine hundred four million, two hundred twenty-six thousand, nine hundred eighty-seven".