40028699 has 4 divisors (see below), whose sum is σ = 40441464. Its totient is φ = 39615936.

The previous prime is 40028689. The next prime is 40028713. The reversal of 40028699 is 99682004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40028699 - 2¹² = 40024603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40028629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206237 + ... + 206430.

It is an arithmetic number, because the mean of its divisors is an integer number (10110366).

Almost surely, 2^40028699 is an apocalyptic number.

40028699 is a deficient number, since it is larger than the sum of its proper divisors (412765).

40028699 is an equidigital number, since it uses as much as digits as its factorization.

40028699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412764.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 40028699 is about 6326.8237686852. The cubic root of 40028699 is about 342.0769607816.

The spelling of 40028699 in words is "forty million, twenty-eight thousand, six hundred ninety-nine".