40085280 has 144 divisors (see below), whose sum is σ = 141994944. Its totient is φ = 10679040.

The previous prime is 40085273. The next prime is 40085293. The reversal of 40085280 is 8258004.

It is a tau number, because it is divible by the number of its divisors (144).

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

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 23 ways as a sum of consecutive naturals, for example, 38365 + ... + 39395.

It is an arithmetic number, because the mean of its divisors is an integer number (986076).

Almost surely, 2^40085280 is an apocalyptic number.

40085280 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 40085280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70997472).

40085280 is an abundant number, since it is smaller than the sum of its proper divisors (101909664).

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

40085280 is a wasteful number, since it uses less digits than its factorization.

40085280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 40085280 is about 6331.2937066606. The cubic root of 40085280 is about 342.2380613972.

The spelling of 40085280 in words is "forty million, eighty-five thousand, two hundred eighty".