40999986 has 64 divisors (see below), whose sum is σ = 97200000. Its totient is φ = 12773376.

The previous prime is 40999969. The next prime is 40999993. The reversal of 40999986 is 68999904.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 91090 + ... + 91538.

It is an arithmetic number, because the mean of its divisors is an integer number (1518750).

Almost surely, 2^40999986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40999986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48600000).

40999986 is an abundant number, since it is smaller than the sum of its proper divisors (56200014).

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

40999986 is a wasteful number, since it uses less digits than its factorization.

40999986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 40999986 is about 6403.1231442164. The cubic root of 40999986 is about 344.8216847903.

The spelling of 40999986 in words is "forty million, nine hundred ninety-nine thousand, nine hundred eighty-six".