40421878 has 16 divisors (see below), whose sum is σ = 69501600. Its totient is φ = 17271936.

The previous prime is 40421867. The next prime is 40421891. The reversal of 40421878 is 87812404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (4343850).

Almost surely, 2^40421878 is an apocalyptic number.

40421878 is a deficient number, since it is larger than the sum of its proper divisors (29079722).

40421878 is a wasteful number, since it uses less digits than its factorization.

40421878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8631.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 40421878 is about 6357.8202239447. The cubic root of 40421878 is about 343.1933223272.

The spelling of 40421878 in words is "forty million, four hundred twenty-one thousand, eight hundred seventy-eight".