40280328 has 80 divisors (see below), whose sum is σ = 123100560. Its totient is φ = 12204000.

The previous prime is 40280321. The next prime is 40280347. The reversal of 40280328 is 82308204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40280321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4303 + ... + 9953.

It is an arithmetic number, because the mean of its divisors is an integer number (1538757).

Almost surely, 2^40280328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40280328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61550280).

40280328 is an abundant number, since it is smaller than the sum of its proper divisors (82820232).

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

40280328 is a wasteful number, since it uses less digits than its factorization.

40280328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680 (or 5667 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 40280328 is about 6346.6785013895. The cubic root of 40280328 is about 342.7922537913.

The spelling of 40280328 in words is "forty million, two hundred eighty thousand, three hundred twenty-eight".