40431430 has 32 divisors (see below), whose sum is σ = 82504800. Its totient is φ = 14141952.

The previous prime is 40431407. The next prime is 40431431. The reversal of 40431430 is 3413404.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 40431398 and 40431407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40431431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5715 + ... + 10654.

It is an arithmetic number, because the mean of its divisors is an integer number (2578275).

Almost surely, 2^40431430 is an apocalyptic number.

40431430 is an abundant number, since it is smaller than the sum of its proper divisors (42073370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40431430 is a wasteful number, since it uses less digits than its factorization.

40431430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16408.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40431430 is about 6358.5713804282. The cubic root of 40431430 is about 343.2203532701.

Adding to 40431430 its reverse (3413404), we get a palindrome (43844834).

The spelling of 40431430 in words is "forty million, four hundred thirty-one thousand, four hundred thirty".