40105530 has 80 divisors (see below), whose sum is σ = 109596960. Its totient is φ = 10520928.

The previous prime is 40105489. The next prime is 40105553. The reversal of 40105530 is 3550104.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53901 + ... + 54639.

It is an arithmetic number, because the mean of its divisors is an integer number (1369962).

Almost surely, 2^40105530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40105530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54798480).

40105530 is an abundant number, since it is smaller than the sum of its proper divisors (69491430).

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

40105530 is a wasteful number, since it uses less digits than its factorization.

40105530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 40105530 is about 6332.8927039703. The cubic root of 40105530 is about 342.2956815017.

Adding to 40105530 its reverse (3550104), we get a palindrome (43655634).

It can be divided in two parts, 40 and 105530, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 40105530 in words is "forty million, one hundred five thousand, five hundred thirty".