40905540 has 96 divisors (see below), whose sum is σ = 137074560. Its totient is φ = 10067328.

The previous prime is 40905539. The next prime is 40905541. The reversal of 40905540 is 4550904.

It is an interprime number because it is at equal distance from previous prime (40905539) and next prime (40905541).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40905541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4107 + ... + 9933.

It is an arithmetic number, because the mean of its divisors is an integer number (1427860).

Almost surely, 2^40905540 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 40905540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68537280).

40905540 is an abundant number, since it is smaller than the sum of its proper divisors (96169020).

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

40905540 is a wasteful number, since it uses less digits than its factorization.

40905540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858 (or 5850 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40905540 is about 6395.7438973117. The cubic root of 40905540 is about 344.5567085403.

The spelling of 40905540 in words is "forty million, nine hundred five thousand, five hundred forty".