40345429 has 8 divisors (see below), whose sum is σ = 41566680. Its totient is φ = 39131136.

The previous prime is 40345423. The next prime is 40345433. The reversal of 40345429 is 92454304.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21622500 + 18722929 = 4650^2 + 4327^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40345429 - 2⁵ = 40345397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40345429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40345423) 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, 11517 + ... + 14605.

It is an arithmetic number, because the mean of its divisors is an integer number (5195835).

Almost surely, 2^40345429 is an apocalyptic number.

It is an amenable number.

40345429 is a deficient number, since it is larger than the sum of its proper divisors (1221251).

40345429 is a wasteful number, since it uses less digits than its factorization.

40345429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40345429 is about 6351.8051764833. The cubic root of 40345429 is about 342.9768278169.

The spelling of 40345429 in words is "forty million, three hundred forty-five thousand, four hundred twenty-nine".