1872220049 has 8 divisors (see below), whose sum is σ = 2145269760. Its totient is φ = 1600567776.

The previous prime is 1872220027. The next prime is 1872220057. The reversal of 1872220049 is 9400222781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1872220049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1872220099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346484 + ... + 351845.

It is an arithmetic number, because the mean of its divisors is an integer number (268158720).

Almost surely, 2^1872220049 is an apocalyptic number.

It is an amenable number.

1872220049 is a deficient number, since it is larger than the sum of its proper divisors (273049711).

1872220049 is an equidigital number, since it uses as much as digits as its factorization.

1872220049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698719.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1872220049 is about 43269.1581729989. The cubic root of 1872220049 is about 1232.4963180703.

The spelling of 1872220049 in words is "one billion, eight hundred seventy-two million, two hundred twenty thousand, forty-nine".