2821861042 has 64 divisors (see below), whose sum is σ = 6017566464. Its totient is φ = 955146240.

The previous prime is 2821860989. The next prime is 2821861061. The reversal of 2821861042 is 2401681282.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 2821860989 and 2821861007.

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, 7423 + ... + 75490.

It is an arithmetic number, because the mean of its divisors is an integer number (94024476).

Almost surely, 2^2821861042 is an apocalyptic number.

2821861042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2821861042 is an abundant number, since it is smaller than the sum of its proper divisors (3195705422).

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

2821861042 is a wasteful number, since it uses less digits than its factorization.

2821861042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82963.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 2821861042 is about 53121.1920235230. The cubic root of 2821861042 is about 1413.1183673269.

The spelling of 2821861042 in words is "two billion, eight hundred twenty-one million, eight hundred sixty-one thousand, forty-two".