40221646 has 4 divisors (see below), whose sum is σ = 60332472. Its totient is φ = 20110822.

The previous prime is 40221607. The next prime is 40221659. The reversal of 40221646 is 64612204.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40221646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055410 + ... + 10055413.

It is an arithmetic number, because the mean of its divisors is an integer number (15083118).

Almost surely, 2^40221646 is an apocalyptic number.

40221646 is a deficient number, since it is larger than the sum of its proper divisors (20110826).

40221646 is a wasteful number, since it uses less digits than its factorization.

40221646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110825.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40221646 is about 6342.0537682994. The cubic root of 40221646 is about 342.6257083797.

The spelling of 40221646 in words is "forty million, two hundred twenty-one thousand, six hundred forty-six".