1881988704 has 72 divisors (see below), whose sum is σ = 5380083072. Its totient is φ = 624026880.

The previous prime is 1881988687. The next prime is 1881988721. The reversal of 1881988704 is 4078891881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1881988687) and next prime (1881988721).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37902 + ... + 72114.

It is an arithmetic number, because the mean of its divisors is an integer number (74723376).

Almost surely, 2^1881988704 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 1881988704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2690041536).

1881988704 is an abundant number, since it is smaller than the sum of its proper divisors (3498094368).

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

1881988704 is a wasteful number, since it uses less digits than its factorization.

1881988704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34420 (or 34409 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 54.

The square root of 1881988704 is about 43381.8937345985. The cubic root of 1881988704 is about 1234.6361932768.

The spelling of 1881988704 in words is "one billion, eight hundred eighty-one million, nine hundred eighty-eight thousand, seven hundred four".