40705290 has 48 divisors (see below), whose sum is σ = 108096768. Its totient is φ = 10622688.

The previous prime is 40705289. The next prime is 40705297. The reversal of 40705290 is 9250704.

It is not an unprimeable number, because it can be changed into a prime (40705297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582 + ... + 9041.

It is an arithmetic number, because the mean of its divisors is an integer number (2252016).

Almost surely, 2^40705290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40705290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54048384).

40705290 is an abundant number, since it is smaller than the sum of its proper divisors (67391478).

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

40705290 is a wasteful number, since it uses less digits than its factorization.

40705290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9683 (or 9680 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 40705290 is about 6380.0697488350. The cubic root of 40705290 is about 343.9935380524.

Adding to 40705290 its reverse (9250704), we get a palindrome (49955994).

The spelling of 40705290 in words is "forty million, seven hundred five thousand, two hundred ninety".