1821049572 has 48 divisors (see below), whose sum is σ = 4381211520. Its totient is φ = 588275712.

The previous prime is 1821049561. The next prime is 1821049589. The reversal of 1821049572 is 2759401281.

It is a self number, because there is not a number n which added to its sum of digits gives 1821049572.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 106129 + ... + 122087.

It is an arithmetic number, because the mean of its divisors is an integer number (91275240).

Almost surely, 2^1821049572 is an apocalyptic number.

1821049572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1821049572 is an abundant number, since it is smaller than the sum of its proper divisors (2560161948).

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

1821049572 is a wasteful number, since it uses less digits than its factorization.

1821049572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16260 (or 16258 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1821049572 is about 42673.7574160045. The cubic root of 1821049572 is about 1221.1638030061.

The spelling of 1821049572 in words is "one billion, eight hundred twenty-one million, forty-nine thousand, five hundred seventy-two".