3865262749 has 4 divisors (see below), whose sum is σ = 4092631164. Its totient is φ = 3637894336.

The previous prime is 3865262689. The next prime is 3865262801. The reversal of 3865262749 is 9472625683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9472625683 = 4817 ⋅1966499.

It can be written as a sum of positive squares in 2 ways, for example, as 1505052025 + 2360210724 = 38795^2 + 48582^2 .

It is a cyclic number.

It is not a de Polignac number, because 3865262749 - 2⁹ = 3865262237 is a prime.

It is a super-2 number, since 2×3865262749² = 29880512237614074002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3865262696 and 3865262705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865265749) 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, 113684182 + ... + 113684215.

It is an arithmetic number, because the mean of its divisors is an integer number (1023157791).

Almost surely, 2^3865262749 is an apocalyptic number.

It is an amenable number.

3865262749 is a deficient number, since it is larger than the sum of its proper divisors (227368415).

3865262749 is a wasteful number, since it uses less digits than its factorization.

3865262749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227368414.

The product of its digits is 4354560, while the sum is 52.

The square root of 3865262749 is about 62171.2373127639. The cubic root of 3865262749 is about 1569.3735920461.

The spelling of 3865262749 in words is "three billion, eight hundred sixty-five million, two hundred sixty-two thousand, seven hundred forty-nine".