40056240 has 160 divisors (see below), whose sum is σ = 143847936. Its totient is φ = 9031680.

The previous prime is 40056229. The next prime is 40056253. The reversal of 40056240 is 4265004.

It is a happy number.

It is a Cunningham number, because it is equal to 6329²-1.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189735 + ... + 189945.

Almost surely, 2^40056240 is an apocalyptic number.

40056240 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 40056240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71923968).

40056240 is an abundant number, since it is smaller than the sum of its proper divisors (103791696).

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

40056240 is a wasteful number, since it uses less digits than its factorization.

40056240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40056240 is about 6328.9999209986. Note that the first 4 decimals coincide. The cubic root of 40056240 is about 342.1553960207.

The spelling of 40056240 in words is "forty million, fifty-six thousand, two hundred forty".