40757728 has 48 divisors (see below), whose sum is σ = 88588080. Its totient is φ = 18304000.

The previous prime is 40757723. The next prime is 40757737. The reversal of 40757728 is 82775704.

It is a super-2 number, since 2×40757728² = 3322384783443968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40757723) 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, 30678 + ... + 31978.

It is an arithmetic number, because the mean of its divisors is an integer number (1845585).

Almost surely, 2^40757728 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 40757728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44294040).

40757728 is an abundant number, since it is smaller than the sum of its proper divisors (47830352).

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

40757728 is a wasteful number, since it uses less digits than its factorization.

40757728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 40757728 is about 6384.1779423822. The cubic root of 40757728 is about 344.1411895641.

The spelling of 40757728 in words is "forty million, seven hundred fifty-seven thousand, seven hundred twenty-eight".