2821281540 has 96 divisors (see below), whose sum is σ = 9848853504. Its totient is φ = 586239360.

The previous prime is 2821281517. The next prime is 2821281587. The reversal of 2821281540 is 451821282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300714 + ... + 309953.

It is an arithmetic number, because the mean of its divisors is an integer number (102592224).

Almost surely, 2^2821281540 is an apocalyptic number.

2821281540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2821281540 is an abundant number, since it is smaller than the sum of its proper divisors (7027571964).

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

2821281540 is a wasteful number, since it uses less digits than its factorization.

2821281540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610697 (or 610695 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 2821281540 is about 53115.7372160078. The cubic root of 2821281540 is about 1413.0216272711.

The spelling of 2821281540 in words is "two billion, eight hundred twenty-one million, two hundred eighty-one thousand, five hundred forty".