40051228 has 36 divisors (see below), whose sum is σ = 82225920. Its totient is φ = 17019072.

The previous prime is 40051223. The next prime is 40051229. The reversal of 40051228 is 82215004.

It is a junction number, because it is equal to n+sod(n) for n = 40051199 and 40051208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40051223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24088 + ... + 25696.

Almost surely, 2^40051228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40051228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41112960).

40051228 is an abundant number, since it is smaller than the sum of its proper divisors (42174692).

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

40051228 is a wasteful number, since it uses less digits than its factorization.

40051228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40051228 is about 6328.6039534798. The cubic root of 40051228 is about 342.1411247995.

The spelling of 40051228 in words is "forty million, fifty-one thousand, two hundred twenty-eight".