4007269809 has 9 divisors (see below), whose sum is σ = 5788552939. Its totient is φ = 2671386600.

The previous prime is 4007269771. The next prime is 4007269813. The reversal of 4007269809 is 9089627004.

It is a happy number.

The square root of 4007269809 is 63303.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 927019809 + 3080250000 = 30447^2 + 55500^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 4007269809 - 2²¹ = 4005172657 is a prime.

It is a super-2 number, since 2×4007269809² = 32116422644245792962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4007269859) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 179359 + ... + 200459.

Almost surely, 2^4007269809 is an apocalyptic number.

4007269809 is the 63303-rd square number.

4007269809 is the 31652-nd centered octagonal number.

It is an amenable number.

4007269809 is a deficient number, since it is larger than the sum of its proper divisors (1781283130).

4007269809 is an frugal number, since it uses more digits than its factorization.

4007269809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42208 (or 21104 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The cubic root of 4007269809 is about 1588.3621451607.

The spelling of 4007269809 in words is "four billion, seven million, two hundred sixty-nine thousand, eight hundred nine".