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28797120 = 2634511101
BaseRepresentation
bin110110111011…
…0100011000000
32000012001020000
41231312203000
524333001440
62505120000
7466525422
oct155664300
960161200
1028797120
1115289780
129789000
135c73621
143b78812
1527dc730
hex1b768c0

28797120 has 280 divisors, whose sum is σ = 112855248. Its totient is φ = 6912000.

The previous prime is 28797101. The next prime is 28797149. The reversal of 28797120 is 2179782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285070 + ... + 285170.

Almost surely, 228797120 is an apocalyptic number.

28797120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28797120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56427624).

28797120 is an abundant number, since it is smaller than the sum of its proper divisors (84058128).

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

28797120 is a wasteful number, since it uses less digits than its factorization.

28797120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28797120 is about 5366.2948111337. The cubic root of 28797120 is about 306.5135551577.

It can be divided in two parts, 2879 and 7120, that added together give a palindrome (9999).

The spelling of 28797120 in words is "twenty-eight million, seven hundred ninety-seven thousand, one hundred twenty".