40244428 has 12 divisors (see below), whose sum is σ = 80488912. Its totient is φ = 17247600.

The previous prime is 40244387. The next prime is 40244441. The reversal of 40244428 is 82444204.

40244428 is an admirable number.

It is a super-2 number, since 2×40244428² = 3239227970094368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1437301 = 40244428 / (4 + 0 + 2 + 4 + 4 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 40244396 and 40244405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718623 + ... + 718678.

Almost surely, 2^40244428 is an apocalyptic number.

It is an amenable number.

40244428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40244428 is a wasteful number, since it uses less digits than its factorization.

40244428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437312 (or 1437310 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 40244428 is about 6343.8496199075. The cubic root of 40244428 is about 342.6903852091.

The spelling of 40244428 in words is "forty million, two hundred forty-four thousand, four hundred twenty-eight".