40030431 has 8 divisors (see below), whose sum is σ = 60998784. Its totient is φ = 22874520.

The previous prime is 40030429. The next prime is 40030433. The reversal of 40030431 is 13403004.

It is an interprime number because it is at equal distance from previous prime (40030429) and next prime (40030433).

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

It is not a de Polignac number, because 40030431 - 2¹ = 40030429 is a prime.

It is a super-2 number, since 2×40030431² = 3204870812091522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40030431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40030433) 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, 953085 + ... + 953126.

It is an arithmetic number, because the mean of its divisors is an integer number (7624848).

Almost surely, 2^40030431 is an apocalyptic number.

40030431 is a deficient number, since it is larger than the sum of its proper divisors (20968353).

40030431 is a wasteful number, since it uses less digits than its factorization.

40030431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906221.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40030431 is about 6326.9606447330. The cubic root of 40030431 is about 342.0818944814.

Adding to 40030431 its reverse (13403004), we get a palindrome (53433435).

The spelling of 40030431 in words is "forty million, thirty thousand, four hundred thirty-one".