1881169920 has 504 divisors, whose sum is σ = 7738804944. Its totient is φ = 429981696.

The previous prime is 1881169903. The next prime is 1881169937. The reversal of 1881169920 is 299611881.

It is a Jordan-Polya number, since it can be written as 9! ⋅ 4! ⋅ (3!)³.

It is an interprime number because it is at equal distance from previous prime (1881169903) and next prime (1881169937).

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268738557 + ... + 268738563.

Almost surely, 2^1881169920 is an apocalyptic number.

1881169920 is a gapful number since it is divisible by the number (10) 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 1881169920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3869402472).

1881169920 is an abundant number, since it is smaller than the sum of its proper divisors (5857635024).

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

1881169920 is an frugal number, since it uses more digits than its factorization.

1881169920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1881169920 is about 43372.4557755265. The cubic root of 1881169920 is about 1234.4571190531.

The spelling of 1881169920 in words is "one billion, eight hundred eighty-one million, one hundred sixty-nine thousand, nine hundred twenty".