40638224 has 40 divisors (see below), whose sum is σ = 87098592. Its totient is φ = 18213120.

The previous prime is 40638187. The next prime is 40638239. The reversal of 40638224 is 42283604.

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, 11267 + ... + 14429.

Almost surely, 2^40638224 is an apocalyptic number.

40638224 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40638224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43549296).

40638224 is an abundant number, since it is smaller than the sum of its proper divisors (46460368).

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

40638224 is a wasteful number, since it uses less digits than its factorization.

40638224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 40638224 is about 6374.8116834931. The cubic root of 40638224 is about 343.8045130516.

The spelling of 40638224 in words is "forty million, six hundred thirty-eight thousand, two hundred twenty-four".