40820280 has 32 divisors (see below), whose sum is σ = 122461200. Its totient is φ = 10885376.

The previous prime is 40820279. The next prime is 40820291. The reversal of 40820280 is 8202804.

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 40820280.

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, 169965 + ... + 170204.

Almost surely, 2^40820280 is an apocalyptic number.

40820280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40820280 is an abundant number, since it is smaller than the sum of its proper divisors (81640920).

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

40820280 is a wasteful number, since it uses less digits than its factorization.

40820280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340183 (or 340179 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 40820280 is about 6389.0750504279. The cubic root of 40820280 is about 344.3171538747.

The spelling of 40820280 in words is "forty million, eight hundred twenty thousand, two hundred eighty".