40221406 has 8 divisors (see below), whose sum is σ = 60425640. Its totient is φ = 20079528.

The previous prime is 40221403. The next prime is 40221409. The reversal of 40221406 is 60412204.

It is an interprime number because it is at equal distance from previous prime (40221403) and next prime (40221409).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13941 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (7553205).

Almost surely, 2^40221406 is an apocalyptic number.

40221406 is a deficient number, since it is larger than the sum of its proper divisors (20204234).

40221406 is a wasteful number, since it uses less digits than its factorization.

40221406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31178.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40221406 is about 6342.0348469557. The cubic root of 40221406 is about 342.6250269031.

The spelling of 40221406 in words is "forty million, two hundred twenty-one thousand, four hundred six".