4291221428 has 24 divisors (see below), whose sum is σ = 8092449960. Its totient is φ = 1979303040.

The previous prime is 4291221391. The next prime is 4291221433. The reversal of 4291221428 is 8241221924.

It can be written as a sum of positive squares in 4 ways, for example, as 209033764 + 4082187664 = 14458^2 + 63892^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58838 + ... + 109746.

It is an arithmetic number, because the mean of its divisors is an integer number (337185415).

Almost surely, 2^4291221428 is an apocalyptic number.

It is an amenable number.

4291221428 is a deficient number, since it is larger than the sum of its proper divisors (3801228532).

4291221428 is a wasteful number, since it uses less digits than its factorization.

4291221428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52547 (or 52545 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 4291221428 is about 65507.4150611975. The cubic root of 4291221428 is about 1625.0259786616.

The spelling of 4291221428 in words is "four billion, two hundred ninety-one million, two hundred twenty-one thousand, four hundred twenty-eight".