40999506 has 16 divisors (see below), whose sum is σ = 82198848. Its totient is φ = 13633200.

The previous prime is 40999493. The next prime is 40999507. The reversal of 40999506 is 60599904.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40999507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5590 + ... + 10641.

It is an arithmetic number, because the mean of its divisors is an integer number (5137428).

Almost surely, 2^40999506 is an apocalyptic number.

40999506 is an abundant number, since it is smaller than the sum of its proper divisors (41199342).

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

40999506 is a wasteful number, since it uses less digits than its factorization.

40999506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16657.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 40999506 is about 6403.0856623975. The cubic root of 40999506 is about 344.8203391390.

The spelling of 40999506 in words is "forty million, nine hundred ninety-nine thousand, five hundred six".