40158228 has 48 divisors (see below), whose sum is σ = 103541760. Its totient is φ = 12012000.

The previous prime is 40158221. The next prime is 40158263. The reversal of 40158228 is 82285104.

It is a super-2 number, since 2×40158228² = 3225366552199968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40158195 and 40158204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40158221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8503 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (2157120).

Almost surely, 2^40158228 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 40158228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51770880).

40158228 is an abundant number, since it is smaller than the sum of its proper divisors (63383532).

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

40158228 is a wasteful number, since it uses less digits than its factorization.

40158228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 40158228 is about 6337.0519959994. The cubic root of 40158228 is about 342.4455394964.

The spelling of 40158228 in words is "forty million, one hundred fifty-eight thousand, two hundred twenty-eight".