40999980 has 192 divisors, whose sum is σ = 140378112. Its totient is φ = 8743680.

The previous prime is 40999969. The next prime is 40999993. The reversal of 40999980 is 8999904.

40999980 = 176² + 177² + ... + 504².

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 611907 + ... + 611973.

It is an arithmetic number, because the mean of its divisors is an integer number (731136).

Almost surely, 2^40999980 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 40999980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70189056).

40999980 is an abundant number, since it is smaller than the sum of its proper divisors (99378132).

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

40999980 is a wasteful number, since it uses less digits than its factorization.

40999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 40999980 is about 6403.1226756950. The cubic root of 40999980 is about 344.8216679697.

The spelling of 40999980 in words is "forty million, nine hundred ninety-nine thousand, nine hundred eighty".