1904739928 has 64 divisors (see below), whose sum is σ = 4451328000. Its totient is φ = 743962752.

The previous prime is 1904739901. The next prime is 1904739929. The reversal of 1904739928 is 8299374091.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904739929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40953 + ... + 74071.

It is an arithmetic number, because the mean of its divisors is an integer number (69552000).

Almost surely, 2^1904739928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1904739928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225664000).

1904739928 is an abundant number, since it is smaller than the sum of its proper divisors (2546588072).

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

1904739928 is a wasteful number, since it uses less digits than its factorization.

1904739928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33224 (or 33220 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 1904739928 is about 43643.3262710348. The cubic root of 1904739928 is about 1239.5914210596.

The spelling of 1904739928 in words is "one billion, nine hundred four million, seven hundred thirty-nine thousand, nine hundred twenty-eight".