40428099 has 8 divisors (see below), whose sum is σ = 59893520. Its totient is φ = 26952048.

The previous prime is 40428083. The next prime is 40428103. The reversal of 40428099 is 99082404.

It is a happy number.

It is not a de Polignac number, because 40428099 - 2⁴ = 40428083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40423099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748642 + ... + 748695.

It is an arithmetic number, because the mean of its divisors is an integer number (7486690).

Almost surely, 2^40428099 is an apocalyptic number.

40428099 is a deficient number, since it is larger than the sum of its proper divisors (19465421).

40428099 is a wasteful number, since it uses less digits than its factorization.

40428099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497346 (or 1497340 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40428099 is about 6358.3094451277. The cubic root of 40428099 is about 343.2109274480.

The spelling of 40428099 in words is "forty million, four hundred twenty-eight thousand, ninety-nine".