28613429 has 4 divisors (see below), whose sum is σ = 30814476. Its totient is φ = 26412384.

The previous prime is 28613419. The next prime is 28613437. The reversal of 28613429 is 92431682.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13675204 + 14938225 = 3698^2 + 3865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28613429 - 2²⁴ = 11836213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28613419) 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, 1100504 + ... + 1100529.

It is an arithmetic number, because the mean of its divisors is an integer number (7703619).

Almost surely, 2^28613429 is an apocalyptic number.

It is an amenable number.

28613429 is a deficient number, since it is larger than the sum of its proper divisors (2201047).

28613429 is a wasteful number, since it uses less digits than its factorization.

28613429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201046.

The product of its digits is 20736, while the sum is 35.

The square root of 28613429 is about 5349.1521758125. The cubic root of 28613429 is about 305.8604351660.

The spelling of 28613429 in words is "twenty-eight million, six hundred thirteen thousand, four hundred twenty-nine".