40433280 has 64 divisors (see below), whose sum is σ = 128887200. Its totient is φ = 10781696.

The previous prime is 40433249. The next prime is 40433299. The reversal of 40433280 is 8233404.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40433280.

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 7 ways as a sum of consecutive naturals, for example, 8610 + ... + 12449.

Almost surely, 2^40433280 is an apocalyptic number.

40433280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40433280 is an abundant number, since it is smaller than the sum of its proper divisors (88453920).

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

40433280 is a wasteful number, since it uses less digits than its factorization.

40433280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21081 (or 21069 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 40433280 is about 6358.7168516926. The cubic root of 40433280 is about 343.2255880422.

Adding to 40433280 its reverse (8233404), we get a palindrome (48666684).

The spelling of 40433280 in words is "forty million, four hundred thirty-three thousand, two hundred eighty".