28798357 has 32 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 21461760.

The previous prime is 28798339. The next prime is 28798361. The reversal of 28798357 is 75389782.

It is a cyclic number.

It is not a de Polignac number, because 28798357 - 2¹⁵ = 28765589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28798357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28798307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106132 + ... + 106402.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^28798357 is an apocalyptic number.

It is an amenable number.

28798357 is a deficient number, since it is larger than the sum of its proper divisors (8802923).

28798357 is a wasteful number, since it uses less digits than its factorization.

28798357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its digits is 846720, while the sum is 49.

The square root of 28798357 is about 5366.4100663293. The cubic root of 28798357 is about 306.5179439281.

It can be divided in two parts, 2879 and 8357, that added together give a square (11236 = 106²).

The spelling of 28798357 in words is "twenty-eight million, seven hundred ninety-eight thousand, three hundred fifty-seven".