40033280 has 88 divisors (see below), whose sum is σ = 109850208. Its totient is φ = 13713408.

The previous prime is 40033277. The next prime is 40033291. The reversal of 40033280 is 8233004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35282 + ... + 36398.

Almost surely, 2^40033280 is an apocalyptic number.

40033280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40033280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54925104).

40033280 is an abundant number, since it is smaller than the sum of its proper divisors (69816928).

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

40033280 is a wasteful number, since it uses less digits than its factorization.

40033280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40033280 is about 6327.1857883264. The cubic root of 40033280 is about 342.0900097092.

Adding to 40033280 its reverse (8233004), we get a palindrome (48266284).

The spelling of 40033280 in words is "forty million, thirty-three thousand, two hundred eighty".