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28851012 = 2233267139
BaseRepresentation
bin110111000001…
…1101101000100
32000021210011000
41232003231010
524341213022
62510213300
7500141511
oct156035504
960253130
1028851012
1115316213
1297b4230
135c92008
143b90308
1527ed6ac
hex1b83b44

28851012 has 24 divisors (see below), whose sum is σ = 74799200. Its totient is φ = 9616968.

The previous prime is 28850999. The next prime is 28851013. The reversal of 28851012 is 21015882.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28851013) 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, 133462 + ... + 133677.

Almost surely, 228851012 is an apocalyptic number.

It is an amenable number.

28851012 is an abundant number, since it is smaller than the sum of its proper divisors (45948188).

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

28851012 is a wasteful number, since it uses less digits than its factorization.

28851012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267152 (or 267144 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28851012 is about 5371.3138057648. The cubic root of 28851012 is about 306.7046429550.

Adding to 28851012 its reverse (21015882), we get a palindrome (49866894).

The spelling of 28851012 in words is "twenty-eight million, eight hundred fifty-one thousand, twelve".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 267139 534278 801417 1068556 1602834 2404251 3205668 4808502 7212753 9617004 14425506 28851012