28813429 has 4 divisors (see below), whose sum is σ = 29023884. Its totient is φ = 28602976.

The previous prime is 28813427. The next prime is 28813439. The reversal of 28813429 is 92431882.

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 6770404 + 22043025 = 2602^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 28813429 - 2¹ = 28813427 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 (28813423) 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, 105022 + ... + 105295.

It is an arithmetic number, because the mean of its divisors is an integer number (7255971).

Almost surely, 2^28813429 is an apocalyptic number.

It is an amenable number.

28813429 is a deficient number, since it is larger than the sum of its proper divisors (210455).

28813429 is a wasteful number, since it uses less digits than its factorization.

28813429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210454.

The product of its digits is 27648, while the sum is 37.

The square root of 28813429 is about 5367.8141733857. The cubic root of 28813429 is about 306.5714080051.

The spelling of 28813429 in words is "twenty-eight million, eight hundred thirteen thousand, four hundred twenty-nine".