1881828390 has 32 divisors (see below), whose sum is σ = 4863803616. Its totient is φ = 463219200.

The previous prime is 1881828349. The next prime is 1881828407. The reversal of 1881828390 is 938281881.

It is a congruent number.

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, 2412211 + ... + 2412990.

It is an arithmetic number, because the mean of its divisors is an integer number (151993863).

Almost surely, 2^1881828390 is an apocalyptic number.

1881828390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1881828390 is an abundant number, since it is smaller than the sum of its proper divisors (2981975226).

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

1881828390 is a wasteful number, since it uses less digits than its factorization.

1881828390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825224.

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 1881828390 is about 43380.0459889106. The cubic root of 1881828390 is about 1234.6011354880.

The spelling of 1881828390 in words is "one billion, eight hundred eighty-one million, eight hundred twenty-eight thousand, three hundred ninety".