1045221880 has 64 divisors (see below), whose sum is σ = 2557448640. Its totient is φ = 382851072.

The previous prime is 1045221839. The next prime is 1045221887. The reversal of 1045221880 is 881225401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045221887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4389 + ... + 45931.

It is an arithmetic number, because the mean of its divisors is an integer number (39960135).

Almost surely, 2^1045221880 is an apocalyptic number.

1045221880 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 1045221880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278724320).

1045221880 is an abundant number, since it is smaller than the sum of its proper divisors (1512226760).

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

1045221880 is a wasteful number, since it uses less digits than its factorization.

1045221880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41608 (or 41604 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 1045221880 is about 32329.8914319241. The cubic root of 1045221880 is about 1014.8522777567.

The spelling of 1045221880 in words is "one billion, forty-five million, two hundred twenty-one thousand, eight hundred eighty".