40188429 has 24 divisors (see below), whose sum is σ = 61027200. Its totient is φ = 25435872.

The previous prime is 40188427. The next prime is 40188443. The reversal of 40188429 is 92488104.

It is not a de Polignac number, because 40188429 - 2¹ = 40188427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40188393 and 40188402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40188427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30192 + ... + 31494.

It is an arithmetic number, because the mean of its divisors is an integer number (2542800).

Almost surely, 2^40188429 is an apocalyptic number.

It is an amenable number.

40188429 is a deficient number, since it is larger than the sum of its proper divisors (20838771).

40188429 is a wasteful number, since it uses less digits than its factorization.

40188429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 40188429 is about 6339.4344384969. The cubic root of 40188429 is about 342.5313633879.

The spelling of 40188429 in words is "forty million, one hundred eighty-eight thousand, four hundred twenty-nine".