40629918 has 24 divisors (see below), whose sum is σ = 94527432. Its totient is φ = 11608464.

The previous prime is 40629917. The next prime is 40629991. The reversal of 40629918 is 81992604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40629913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68805 + ... + 69392.

It is an arithmetic number, because the mean of its divisors is an integer number (3938643).

Almost surely, 2^40629918 is an apocalyptic number.

40629918 is an abundant number, since it is smaller than the sum of its proper divisors (53897514).

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

40629918 is a wasteful number, since it uses less digits than its factorization.

40629918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138216 (or 138209 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 40629918 is about 6374.1601799767. The cubic root of 40629918 is about 343.7810881856.

The spelling of 40629918 in words is "forty million, six hundred twenty-nine thousand, nine hundred eighteen".