3865431 has 8 divisors (see below), whose sum is σ = 5231104. Its totient is φ = 2538360.

The previous prime is 3865429. The next prime is 3865447. The reversal of 3865431 is 1345683.

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

It is not a de Polignac number, because 3865431 - 2¹ = 3865429 is a prime.

It is a super-2 number, since 2×3865431² = 29883113631522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9415 + ... + 9816.

It is an arithmetic number, because the mean of its divisors is an integer number (653888).

Almost surely, 2^3865431 is an apocalyptic number.

3865431 is a deficient number, since it is larger than the sum of its proper divisors (1365673).

3865431 is a wasteful number, since it uses less digits than its factorization.

3865431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301.

The product of its digits is 8640, while the sum is 30.

The square root of 3865431 is about 1966.0699377184. The cubic root of 3865431 is about 156.9396362800.

The spelling of 3865431 in words is "three million, eight hundred sixty-five thousand, four hundred thirty-one".