40520280 has 32 divisors (see below), whose sum is σ = 121561200. Its totient is φ = 10805376.

The previous prime is 40520267. The next prime is 40520281. The reversal of 40520280 is 8202504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520281) by changing a digit.

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, 168715 + ... + 168954.

Almost surely, 2^40520280 is an apocalyptic number.

40520280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40520280 is an abundant number, since it is smaller than the sum of its proper divisors (81040920).

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

40520280 is a wasteful number, since it uses less digits than its factorization.

40520280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337683 (or 337679 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40520280 is about 6365.5541785457. The cubic root of 40520280 is about 343.4715837069.

Adding to 40520280 its reverse (8202504), we get a palindrome (48722784).

The spelling of 40520280 in words is "forty million, five hundred twenty thousand, two hundred eighty".