40340556 has 72 divisors (see below), whose sum is σ = 105731808. Its totient is φ = 12960000.

The previous prime is 40340549. The next prime is 40340557. The reversal of 40340556 is 65504304.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40340557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222786 + ... + 222966.

Almost surely, 2^40340556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40340556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52865904).

40340556 is an abundant number, since it is smaller than the sum of its proper divisors (65391252).

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

40340556 is a wasteful number, since it uses less digits than its factorization.

40340556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40340556 is about 6351.4215731598. The cubic root of 40340556 is about 342.9630187897.

The spelling of 40340556 in words is "forty million, three hundred forty thousand, five hundred fifty-six".