40728930 has 64 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 9748160.

The previous prime is 40728917. The next prime is 40728953. The reversal of 40728930 is 3982704.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 40728891 and 40728900.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26647 + ... + 28133.

It is an arithmetic number, because the mean of its divisors is an integer number (1687392).

Almost surely, 2^40728930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40728930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53996544).

40728930 is an abundant number, since it is smaller than the sum of its proper divisors (67264158).

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

40728930 is a wasteful number, since it uses less digits than its factorization.

40728930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 40728930 is about 6381.9221242507. The cubic root of 40728930 is about 344.0601177156.

The spelling of 40728930 in words is "forty million, seven hundred twenty-eight thousand, nine hundred thirty".