1904440572 has 144 divisors (see below), whose sum is σ = 5516888832. Its totient is φ = 571380480.

The previous prime is 1904440553. The next prime is 1904440621. The reversal of 1904440572 is 2750444091.

It is a happy number.

1904440572 is a `hidden beast` number, since 1 + 9 + 0 + 44 + 40 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 377547 + ... + 382557.

It is an arithmetic number, because the mean of its divisors is an integer number (38311728).

Almost surely, 2^1904440572 is an apocalyptic number.

1904440572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1904440572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2758444416).

1904440572 is an abundant number, since it is smaller than the sum of its proper divisors (3612448260).

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

1904440572 is a wasteful number, since it uses less digits than its factorization.

1904440572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070 (or 5056 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1904440572 is about 43639.8965626638. The cubic root of 1904440572 is about 1239.5264780603.

The spelling of 1904440572 in words is "one billion, nine hundred four million, four hundred forty thousand, five hundred seventy-two".