2045421280 has 192 divisors, whose sum is σ = 5803757568. Its totient is φ = 666040320.

The previous prime is 2045421251. The next prime is 2045421289. The reversal of 2045421280 is 821245402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045421289) 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 31 ways as a sum of consecutive naturals, for example, 6980814 + ... + 6981106.

It is an arithmetic number, because the mean of its divisors is an integer number (30227904).

Almost surely, 2^2045421280 is an apocalyptic number.

2045421280 is a gapful number since it is divisible by the number (20) 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 2045421280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2901878784).

2045421280 is an abundant number, since it is smaller than the sum of its proper divisors (3758336288).

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

2045421280 is a wasteful number, since it uses less digits than its factorization.

2045421280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 2045421280 is about 45226.3339217319. Note that the first 3 decimals coincide. The cubic root of 2045421280 is about 1269.3876147353.

Adding to 2045421280 its reverse (821245402), we get a palindrome (2866666682).

The spelling of 2045421280 in words is "two billion, forty-five million, four hundred twenty-one thousand, two hundred eighty".