1879220645 has 8 divisors (see below), whose sum is σ = 2277392760. Its totient is φ = 1488491200.

The previous prime is 1879220641. The next prime is 1879220657. The reversal of 1879220645 is 5460229781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 115304644 + 1763916001 = 10738^2 + 41999^2 .

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

It is not a de Polignac number, because 1879220645 - 2² = 1879220641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1879220596 and 1879220605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1879220641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860110 + ... + 1861119.

It is an arithmetic number, because the mean of its divisors is an integer number (284674095).

Almost surely, 2^1879220645 is an apocalyptic number.

It is an amenable number.

1879220645 is a deficient number, since it is larger than the sum of its proper divisors (398172115).

1879220645 is a wasteful number, since it uses less digits than its factorization.

1879220645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721335.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1879220645 is about 43349.9786043776. The cubic root of 1879220645 is about 1234.0305887343.

The spelling of 1879220645 in words is "one billion, eight hundred seventy-nine million, two hundred twenty thousand, six hundred forty-five".