40355840 has 96 divisors (see below), whose sum is σ = 110859840. Its totient is φ = 13811712.

The previous prime is 40355837. The next prime is 40355857. The reversal of 40355840 is 4855304.

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, 71399 + ... + 71961.

It is an arithmetic number, because the mean of its divisors is an integer number (1154790).

Almost surely, 2^40355840 is an apocalyptic number.

40355840 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 40355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55429920).

40355840 is an abundant number, since it is smaller than the sum of its proper divisors (70504000).

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

40355840 is an equidigital number, since it uses as much as digits as its factorization.

40355840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 40355840 is about 6352.6246544243. The cubic root of 40355840 is about 343.0063266122.

The spelling of 40355840 in words is "forty million, three hundred fifty-five thousand, eight hundred forty".