40121224 has 64 divisors (see below), whose sum is σ = 93623040. Its totient is φ = 15836160.

The previous prime is 40121219. The next prime is 40121231. The reversal of 40121224 is 42212104.

It is a junction number, because it is equal to n+sod(n) for n = 40121198 and 40121207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18417 + ... + 20479.

It is an arithmetic number, because the mean of its divisors is an integer number (1462860).

Almost surely, 2^40121224 is an apocalyptic number.

40121224 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 40121224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46811520).

40121224 is an abundant number, since it is smaller than the sum of its proper divisors (53501816).

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

40121224 is a wasteful number, since it uses less digits than its factorization.

40121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40121224 is about 6334.1316689819. The cubic root of 40121224 is about 342.3403244546.

Adding to 40121224 its reverse (42212104), we get a palindrome (82333328).

The spelling of 40121224 in words is "forty million, one hundred twenty-one thousand, two hundred twenty-four".