4021789298 has 6 divisors (see below), whose sum is σ = 6032818479. Its totient is φ = 2010849806.

The previous prime is 4021789267. The next prime is 4021789307. The reversal of 4021789298 is 8929871204.

It can be written as a sum of positive squares in only one way, i.e., 2010894649 + 2010894649 = 44843^2 + 44843^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=44843.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67265 + ... + 112107.

Almost surely, 2^4021789298 is an apocalyptic number.

4021789298 is a deficient number, since it is larger than the sum of its proper divisors (2011029181).

4021789298 is an frugal number, since it uses more digits than its factorization.

4021789298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89688 (or 44845 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 4021789298 is about 63417.5787774967. The cubic root of 4021789298 is about 1590.2781969083.

Multiplying 4021789298 by its sum of digits (50), we get a square (201089464900 = 448430²).

The spelling of 4021789298 in words is "four billion, twenty-one million, seven hundred eighty-nine thousand, two hundred ninety-eight".