4078431 has 20 divisors (see below), whose sum is σ = 6963792. Its totient is φ = 2330208.

The previous prime is 4078411. The next prime is 4078439. The reversal of 4078431 is 1348704.

It is not a de Polignac number, because 4078431 - 2⁶ = 4078367 is a prime.

It is a super-2 number, since 2×4078431² = 33267198843522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 4078395 and 4078404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4078439) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3030 + ... + 4163.

Almost surely, 2^4078431 is an apocalyptic number.

4078431 is a deficient number, since it is larger than the sum of its proper divisors (2885361).

4078431 is an equidigital number, since it uses as much as digits as its factorization.

4078431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212 (or 7203 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 4078431 is about 2019.5125649522. The cubic root of 4078431 is about 159.7709091193.

The spelling of 4078431 in words is "four million, seventy-eight thousand, four hundred thirty-one".