40446028 has 12 divisors (see below), whose sum is σ = 80892112. Its totient is φ = 17334000.

The previous prime is 40446023. The next prime is 40446053. The reversal of 40446028 is 82064404.

40446028 is an admirable number.

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: 1444501 = 40446028 / (4 + 0 + 4 + 4 + 6 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 40445987 and 40446005.

It is not an unprimeable number, because it can be changed into a prime (40446023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722223 + ... + 722278.

Almost surely, 2^40446028 is an apocalyptic number.

It is an amenable number.

40446028 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.

40446028 is a wasteful number, since it uses less digits than its factorization.

40446028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444512 (or 1444510 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 40446028 is about 6359.7191761901. The cubic root of 40446028 is about 343.2616555263.

The spelling of 40446028 in words is "forty million, four hundred forty-six thousand, twenty-eight".