40561928 has 32 divisors (see below), whose sum is σ = 83916000. Its totient is φ = 18226560.

The previous prime is 40561921. The next prime is 40561931. The reversal of 40561928 is 82916504.

It is not an unprimeable number, because it can be changed into a prime (40561921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5243 + ... + 10421.

It is an arithmetic number, because the mean of its divisors is an integer number (2622375).

Almost surely, 2^40561928 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 40561928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41958000).

40561928 is an abundant number, since it is smaller than the sum of its proper divisors (43354072).

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

40561928 is a wasteful number, since it uses less digits than its factorization.

40561928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285 (or 5281 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 40561928 is about 6368.8246953421. The cubic root of 40561928 is about 343.5892203266.

The spelling of 40561928 in words is "forty million, five hundred sixty-one thousand, nine hundred twenty-eight".