40328688 has 20 divisors (see below), whose sum is σ = 104182568. Its totient is φ = 13442880.

The previous prime is 40328671. The next prime is 40328693. The reversal of 40328688 is 88682304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420043 + ... + 420138.

Almost surely, 2^40328688 is an apocalyptic number.

40328688 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40328688 is an abundant number, since it is smaller than the sum of its proper divisors (63853880).

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

40328688 is a wasteful number, since it uses less digits than its factorization.

40328688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840192 (or 840186 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 40328688 is about 6350.4872254025. The cubic root of 40328688 is about 342.9293827939.

It can be divided in two parts, 4032 and 8688, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 40328688 in words is "forty million, three hundred twenty-eight thousand, six hundred eighty-eight".