40321928 has 8 divisors (see below), whose sum is σ = 75603630. Its totient is φ = 20160960.

The previous prime is 40321891. The next prime is 40321937. The reversal of 40321928 is 82912304.

It can be written as a sum of positive squares in only one way, i.e., 35022724 + 5299204 = 5918^2 + 2302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 40321928.

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 as a sum of consecutive naturals, namely, 2520113 + ... + 2520128.

Almost surely, 2^40321928 is an apocalyptic number.

It is an amenable number.

40321928 is a deficient number, since it is larger than the sum of its proper divisors (35281702).

40321928 is a wasteful number, since it uses less digits than its factorization.

40321928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040247 (or 5040243 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40321928 is about 6349.9549604702. The cubic root of 40321928 is about 342.9102208169.

The spelling of 40321928 in words is "forty million, three hundred twenty-one thousand, nine hundred twenty-eight".