40909240 has 32 divisors (see below), whose sum is σ = 92782080. Its totient is φ = 16232832.

The previous prime is 40909237. The next prime is 40909279. The reversal of 40909240 is 4290904.

It is a junction number, because it is equal to n+sod(n) for n = 40909199 and 40909208.

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, 1054 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (2899440).

Almost surely, 2^40909240 is an apocalyptic number.

40909240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40909240 is an abundant number, since it is smaller than the sum of its proper divisors (51872840).

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

40909240 is a wasteful number, since it uses less digits than its factorization.

40909240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191 (or 8187 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40909240 is about 6396.0331456302. The cubic root of 40909240 is about 344.5670968755.

The spelling of 40909240 in words is "forty million, nine hundred nine thousand, two hundred forty".