40280688 has 120 divisors (see below), whose sum is σ = 130572000. Its totient is φ = 11354112.

The previous prime is 40280683. The next prime is 40280699. The reversal of 40280688 is 88608204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40280683) 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 23 ways as a sum of consecutive naturals, for example, 89488 + ... + 89936.

It is an arithmetic number, because the mean of its divisors is an integer number (1088100).

Almost surely, 2^40280688 is an apocalyptic number.

40280688 is a gapful number since it is divisible by the number (48) 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 40280688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65286000).

40280688 is an abundant number, since it is smaller than the sum of its proper divisors (90291312).

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

40280688 is a wasteful number, since it uses less digits than its factorization.

40280688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 40280688 is about 6346.7068626178. The cubic root of 40280688 is about 342.7932750081.

The spelling of 40280688 in words is "forty million, two hundred eighty thousand, six hundred eighty-eight".