28709358 has 16 divisors (see below), whose sum is σ = 58502736. Its totient is φ = 9389120.

The previous prime is 28709357. The next prime is 28709363. The reversal of 28709358 is 85390782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28709357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44823 + ... + 45458.

It is an arithmetic number, because the mean of its divisors is an integer number (3656421).

Almost surely, 2^28709358 is an apocalyptic number.

28709358 is an abundant number, since it is smaller than the sum of its proper divisors (29793378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28709358 is a wasteful number, since it uses less digits than its factorization.

28709358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90339.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 28709358 is about 5358.1114210139. Note that the first 3 decimals coincide. The cubic root of 28709358 is about 306.2018617660.

The spelling of 28709358 in words is "twenty-eight million, seven hundred nine thousand, three hundred fifty-eight".