1881841408 has 36 divisors (see below), whose sum is σ = 3778133688. Its totient is φ = 935459840.

The previous prime is 1881841387. The next prime is 1881841427. The reversal of 1881841408 is 8041481881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23043 + ... + 65533.

It is an arithmetic number, because the mean of its divisors is an integer number (104948158).

Almost surely, 2^1881841408 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 1881841408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889066844).

1881841408 is an abundant number, since it is smaller than the sum of its proper divisors (1896292280).

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

1881841408 is an equidigital number, since it uses as much as digits as its factorization.

1881841408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42680 (or 42666 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 43.

The square root of 1881841408 is about 43380.1960345962. The cubic root of 1881841408 is about 1234.6039823648.

The spelling of 1881841408 in words is "one billion, eight hundred eighty-one million, eight hundred forty-one thousand, four hundred eight".