40421018 has 48 divisors (see below), whose sum is σ = 71820000. Its totient is φ = 16996320.

The previous prime is 40421009. The next prime is 40421021. The reversal of 40421018 is 81012404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271208 + ... + 271356.

It is an arithmetic number, because the mean of its divisors is an integer number (1496250).

Almost surely, 2^40421018 is an apocalyptic number.

40421018 is a deficient number, since it is larger than the sum of its proper divisors (31398982).

40421018 is a wasteful number, since it uses less digits than its factorization.

40421018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 40421018 is about 6357.7525903420. The cubic root of 40421018 is about 343.1908884278.

The spelling of 40421018 in words is "forty million, four hundred twenty-one thousand, eighteen".