1881377280 has 400 divisors, whose sum is σ = 6927886944. Its totient is φ = 487710720.

The previous prime is 1881377279. The next prime is 1881377287. The reversal of 1881377280 is 827731881.

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

It is not an unprimeable number, because it can be changed into a prime (1881377287) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8916375 + ... + 8916585.

Almost surely, 2^1881377280 is an apocalyptic number.

1881377280 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 1881377280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3463943472).

1881377280 is an abundant number, since it is smaller than the sum of its proper divisors (5046509664).

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

1881377280 is an equidigital number, since it uses as much as digits as its factorization.

1881377280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 1881377280 is about 43374.8461668742. The cubic root of 1881377280 is about 1234.5024751585.

The spelling of 1881377280 in words is "one billion, eight hundred eighty-one million, three hundred seventy-seven thousand, two hundred eighty".