4000398722 has 8 divisors (see below), whose sum is σ = 6001237836. Its totient is φ = 1999986112.

The previous prime is 4000398697. The next prime is 4000398791. The reversal of 4000398722 is 2278930004.

It can be written as a sum of positive squares in 2 ways, for example, as 3410443201 + 589955521 = 58399^2 + 24289^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82043 + ... + 121374.

Almost surely, 2^4000398722 is an apocalyptic number.

4000398722 is a deficient number, since it is larger than the sum of its proper divisors (2000839114).

4000398722 is a wasteful number, since it uses less digits than its factorization.

4000398722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213252.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 4000398722 is about 63248.7052990020. The cubic root of 4000398722 is about 1587.4537945260.

The spelling of 4000398722 in words is "four billion, three hundred ninety-eight thousand, seven hundred twenty-two".