40728704 has 32 divisors (see below), whose sum is σ = 85414800. Its totient is φ = 19291392.

The previous prime is 40728683. The next prime is 40728713. The reversal of 40728704 is 40782704.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5942 + ... + 10805.

Almost surely, 2^40728704 is an apocalyptic number.

It is an amenable number.

40728704 is an abundant number, since it is smaller than the sum of its proper divisors (44686096).

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

40728704 is a wasteful number, since it uses less digits than its factorization.

40728704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16780 (or 16768 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 40728704 is about 6381.9044179618. The cubic root of 40728704 is about 344.0594813315.

The spelling of 40728704 in words is "forty million, seven hundred twenty-eight thousand, seven hundred four".