40429720 has 32 divisors (see below), whose sum is σ = 95756400. Its totient is φ = 15320448.

The previous prime is 40429717. The next prime is 40429747. The reversal of 40429720 is 2792404.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25839 + ... + 27358.

Almost surely, 2^40429720 is an apocalyptic number.

40429720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40429720 is an abundant number, since it is smaller than the sum of its proper divisors (55326680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40429720 is a wasteful number, since it uses less digits than its factorization.

40429720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53227 (or 53223 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40429720 is about 6358.4369148400. The cubic root of 40429720 is about 343.2155145009.

The spelling of 40429720 in words is "forty million, four hundred twenty-nine thousand, seven hundred twenty".