4000769 has 4 divisors (see below), whose sum is σ = 4004820. Its totient is φ = 3996720.

The previous prime is 4000751. The next prime is 4000813. The reversal of 4000769 is 9670004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1638400 + 2362369 = 1280^2 + 1537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000769 is a prime.

It is a super-2 number, since 2×4000769² = 32012305182722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4000709) 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, 539 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (1001205).

Almost surely, 2^4000769 is an apocalyptic number.

It is an amenable number.

4000769 is a deficient number, since it is larger than the sum of its proper divisors (4051).

4000769 is a wasteful number, since it uses less digits than its factorization.

4000769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 4000769 is about 2000.1922407609. The cubic root of 4000769 is about 158.7502771401.

The spelling of 4000769 in words is "four million, seven hundred sixty-nine", and thus it is an aban number.