40421658 has 8 divisors (see below), whose sum is σ = 80843328. Its totient is φ = 13473884.

The previous prime is 40421657. The next prime is 40421671. The reversal of 40421658 is 85612404.

It is a sphenic number, since it is the product of 3 distinct primes.

40421658 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40421651) 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 3 ways as a sum of consecutive naturals, for example, 3368466 + ... + 3368477.

It is an arithmetic number, because the mean of its divisors is an integer number (10105416).

Almost surely, 2^40421658 is an apocalyptic number.

40421658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40421658 is a wasteful number, since it uses less digits than its factorization.

40421658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736948.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 40421658 is about 6357.8029223939. The cubic root of 40421658 is about 343.1926997051.

The spelling of 40421658 in words is "forty million, four hundred twenty-one thousand, six hundred fifty-eight".