40030399 has 2 divisors, whose sum is σ = 40030400. Its totient is φ = 40030398.

The previous prime is 40030387. The next prime is 40030421. The reversal of 40030399 is 99303004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40030399 - 2⁷ = 40030271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40030369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20015199 + 20015200.

It is an arithmetic number, because the mean of its divisors is an integer number (20015200).

Almost surely, 2^40030399 is an apocalyptic number.

40030399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40030399 is an equidigital number, since it uses as much as digits as its factorization.

40030399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 40030399 is about 6326.9581158721. The cubic root of 40030399 is about 342.0818033289.

The spelling of 40030399 in words is "forty million, thirty thousand, three hundred ninety-nine".