40221888 has 56 divisors (see below), whose sum is σ = 121627392. Its totient is φ = 11491584.

The previous prime is 40221887. The next prime is 40221889. The reversal of 40221888 is 88812204.

It is an interprime number because it is at equal distance from previous prime (40221887) and next prime (40221889).

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (40221887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13620 + ... + 16307.

Almost surely, 2^40221888 is an apocalyptic number.

40221888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40221888 is an abundant number, since it is smaller than the sum of its proper divisors (81405504).

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

40221888 is a wasteful number, since it uses less digits than its factorization.

40221888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29949 (or 29939 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 40221888 is about 6342.0728472637. The cubic root of 40221888 is about 342.6263955325.

The spelling of 40221888 in words is "forty million, two hundred twenty-one thousand, eight hundred eighty-eight".