40389903 has 12 divisors (see below), whose sum is σ = 59918248. Its totient is φ = 26198640.

The previous prime is 40389893. The next prime is 40389917. The reversal of 40389903 is 30998304.

It is not a de Polignac number, because 40389903 - 2⁴ = 40389887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60313 + ... + 60978.

Almost surely, 2^40389903 is an apocalyptic number.

40389903 is a deficient number, since it is larger than the sum of its proper divisors (19528345).

40389903 is a wasteful number, since it uses less digits than its factorization.

40389903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121334 (or 121331 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 40389903 is about 6355.3051067592. The cubic root of 40389903 is about 343.1028061531.

The spelling of 40389903 in words is "forty million, three hundred eighty-nine thousand, nine hundred three".