40071429 has 24 divisors (see below), whose sum is σ = 60645312. Its totient is φ = 26438400.

The previous prime is 40071413. The next prime is 40071433. The reversal of 40071429 is 92417004.

It is a happy number.

It is not a de Polignac number, because 40071429 - 2⁴ = 40071413 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40071439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24229 + ... + 25829.

It is an arithmetic number, because the mean of its divisors is an integer number (2526888).

Almost surely, 2^40071429 is an apocalyptic number.

It is an amenable number.

40071429 is a deficient number, since it is larger than the sum of its proper divisors (20573883).

40071429 is a wasteful number, since it uses less digits than its factorization.

40071429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1707 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 40071429 is about 6330.1997598812. The cubic root of 40071429 is about 342.1986380687.

The spelling of 40071429 in words is "forty million, seventy-one thousand, four hundred twenty-nine".