40308928 has 56 divisors (see below), whose sum is σ = 90123264. Its totient is φ = 17721600.

The previous prime is 40308923. The next prime is 40308941. The reversal of 40308928 is 82980304.

It is a junction number, because it is equal to n+sod(n) for n = 40308893 and 40308902.

It is not an unprimeable number, because it can be changed into a prime (40308923) 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, 20901 + ... + 22747.

It is an arithmetic number, because the mean of its divisors is an integer number (1609344).

Almost surely, 2^40308928 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 40308928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45061632).

40308928 is an abundant number, since it is smaller than the sum of its proper divisors (49814336).

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

40308928 is a wasteful number, since it uses less digits than its factorization.

40308928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40308928 is about 6348.9312486433. The cubic root of 40308928 is about 342.8733648409.

The spelling of 40308928 in words is "forty million, three hundred eight thousand, nine hundred twenty-eight".