40488399 has 12 divisors (see below), whose sum is σ = 66838096. Its totient is φ = 23136192.

The previous prime is 40488367. The next prime is 40488403. The reversal of 40488399 is 99388404.

It is a happy number.

It is not a de Polignac number, because 40488399 - 2⁵ = 40488367 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 (40488319) 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, 321274 + ... + 321399.

Almost surely, 2^40488399 is an apocalyptic number.

40488399 is a deficient number, since it is larger than the sum of its proper divisors (26349697).

40488399 is a wasteful number, since it uses less digits than its factorization.

40488399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642686 (or 642683 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 40488399 is about 6363.0495047579. The cubic root of 40488399 is about 343.3814799312.

The spelling of 40488399 in words is "forty million, four hundred eighty-eight thousand, three hundred ninety-nine".