40328881 has 4 divisors (see below), whose sum is σ = 40509952. Its totient is φ = 40147812.

The previous prime is 40328863. The next prime is 40328891. The reversal of 40328881 is 18882304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40328881 - 2¹⁹ = 39804593 is a prime.

It is a super-2 number, since 2×40328881² = 3252837285424322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40328831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90201 + ... + 90646.

It is an arithmetic number, because the mean of its divisors is an integer number (10127488).

Almost surely, 2^40328881 is an apocalyptic number.

It is an amenable number.

40328881 is a deficient number, since it is larger than the sum of its proper divisors (181071).

40328881 is a wasteful number, since it uses less digits than its factorization.

40328881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181070.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 40328881 is about 6350.5024210687. The cubic root of 40328881 is about 342.9299298425.

It can be divided in two parts, 40328 and 881, that added together give a square (41209 = 203²).

The spelling of 40328881 in words is "forty million, three hundred twenty-eight thousand, eight hundred eighty-one".