4401645890 has 8 divisors (see below), whose sum is σ = 7922962620. Its totient is φ = 1760658352.

The previous prime is 4401645889. The next prime is 4401645893. The reversal of 4401645890 is 985461044.

It can be written as a sum of positive squares in 2 ways, for example, as 4383896521 + 17749369 = 66211^2 + 4213^2 .

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

It is not an unprimeable number, because it can be changed into a prime (4401645893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220082285 + ... + 220082304.

Almost surely, 2^4401645890 is an apocalyptic number.

4401645890 is a deficient number, since it is larger than the sum of its proper divisors (3521316730).

4401645890 is a wasteful number, since it uses less digits than its factorization.

4401645890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440164596.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 4401645890 is about 66344.9010097988. The cubic root of 4401645890 is about 1638.8468358341.

The spelling of 4401645890 in words is "four billion, four hundred one million, six hundred forty-five thousand, eight hundred ninety".