40328831 has 2 divisors, whose sum is σ = 40328832. Its totient is φ = 40328830.

The previous prime is 40328807. The next prime is 40328843. The reversal of 40328831 is 13882304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40328831 - 2⁶ = 40328767 is a prime.

It is a super-2 number, since 2×40328831² = 3252829219653122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40328794 and 40328803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40328851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20164415 + 20164416.

It is an arithmetic number, because the mean of its divisors is an integer number (20164416).

Almost surely, 2^40328831 is an apocalyptic number.

40328831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40328831 is an equidigital number, since it uses as much as digits as its factorization.

40328831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 40328831 is about 6350.4984843711. The cubic root of 40328831 is about 342.9297881202.

The spelling of 40328831 in words is "forty million, three hundred twenty-eight thousand, eight hundred thirty-one".