40388233 has 2 divisors, whose sum is σ = 40388234. Its totient is φ = 40388232.

The previous prime is 40388219. The next prime is 40388261. The reversal of 40388233 is 33288304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 11744329 = 5352^2 + 3427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40388233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40388195 and 40388204.

It is not a weakly prime, because it can be changed into another prime (40388263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20194116 + 20194117.

It is an arithmetic number, because the mean of its divisors is an integer number (20194117).

Almost surely, 2^40388233 is an apocalyptic number.

It is an amenable number.

40388233 is a deficient number, since it is larger than the sum of its proper divisors (1).

40388233 is an equidigital number, since it uses as much as digits as its factorization.

40388233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 40388233 is about 6355.1737191048. The cubic root of 40388233 is about 343.0980773344.

The spelling of 40388233 in words is "forty million, three hundred eighty-eight thousand, two hundred thirty-three".