40100399 has 8 divisors (see below), whose sum is σ = 42625440. Its totient is φ = 37593856.

The previous prime is 40100387. The next prime is 40100441. The reversal of 40100399 is 99300104.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40100399 - 2²⁰ = 39051823 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 (40100299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 8955.

It is an arithmetic number, because the mean of its divisors is an integer number (5328180).

Almost surely, 2^40100399 is an apocalyptic number.

40100399 is a deficient number, since it is larger than the sum of its proper divisors (2525041).

40100399 is a wasteful number, since it uses less digits than its factorization.

40100399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9249.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 40100399 is about 6332.4875838804. The cubic root of 40100399 is about 342.2810833981.

The spelling of 40100399 in words is "forty million, one hundred thousand, three hundred ninety-nine".