28749422 has 16 divisors (see below), whose sum is σ = 47205312. Its totient is φ = 13050720.

The previous prime is 28749421. The next prime is 28749449. The reversal of 28749422 is 22494782.

It is a super-3 number, since 3×28749422³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28749421) 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, 7478 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (2950332).

Almost surely, 2^28749422 is an apocalyptic number.

28749422 is a deficient number, since it is larger than the sum of its proper divisors (18455890).

28749422 is a wasteful number, since it uses less digits than its factorization.

28749422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18203.

The product of its digits is 64512, while the sum is 38.

The square root of 28749422 is about 5361.8487483330. The cubic root of 28749422 is about 306.3442307836.

The spelling of 28749422 in words is "twenty-eight million, seven hundred forty-nine thousand, four hundred twenty-two".