40454428 has 12 divisors (see below), whose sum is σ = 80908912. Its totient is φ = 17337600.

The previous prime is 40454417. The next prime is 40454437. The reversal of 40454428 is 82445404.

40454428 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40454428.

It is a congruent number.

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, 722373 + ... + 722428.

Almost surely, 2^40454428 is an apocalyptic number.

It is an amenable number.

40454428 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.

40454428 is a wasteful number, since it uses less digits than its factorization.

40454428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444812 (or 1444810 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 40454428 is about 6360.3795484232. The cubic root of 40454428 is about 343.2854172194.

It can be divided in two parts, 404 and 54428, that multiplied together give a palindrome (21988912).

The spelling of 40454428 in words is "forty million, four hundred fifty-four thousand, four hundred twenty-eight".