40198429 has 4 divisors (see below), whose sum is σ = 40240800. Its totient is φ = 40156060.

The previous prime is 40198397. The next prime is 40198447. The reversal of 40198429 is 92489104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40198429 - 2⁵ = 40198397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40198469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19729 + ... + 21670.

It is an arithmetic number, because the mean of its divisors is an integer number (10060200).

Almost surely, 2^40198429 is an apocalyptic number.

It is an amenable number.

40198429 is a deficient number, since it is larger than the sum of its proper divisors (42371).

40198429 is an equidigital number, since it uses as much as digits as its factorization.

40198429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42370.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 40198429 is about 6340.2231033300. The cubic root of 40198429 is about 342.5597714782.

The spelling of 40198429 in words is "forty million, one hundred ninety-eight thousand, four hundred twenty-nine".