28418129 has 4 divisors (see below), whose sum is σ = 29913840. Its totient is φ = 26922420.

The previous prime is 28418119. The next prime is 28418147. The reversal of 28418129 is 92181482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28418129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28418119) 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, 747827 + ... + 747864.

It is an arithmetic number, because the mean of its divisors is an integer number (7478460).

Almost surely, 2^28418129 is an apocalyptic number.

It is an amenable number.

28418129 is a deficient number, since it is larger than the sum of its proper divisors (1495711).

28418129 is a wasteful number, since it uses less digits than its factorization.

28418129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495710.

The product of its digits is 9216, while the sum is 35.

The square root of 28418129 is about 5330.8656895480. The cubic root of 28418129 is about 305.1629658523.

The spelling of 28418129 in words is "twenty-eight million, four hundred eighteen thousand, one hundred twenty-nine".