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28948988 = 227237247
BaseRepresentation
bin110111001101…
…1100111111100
32000110202112202
41232123213330
524402331423
62512251032
7501030245
oct156334774
960422482
1028948988
1115382892
129840a78
135cc77a3
143bb7ccc
15281c728
hex1b9b9fc

28948988 has 6 divisors (see below), whose sum is σ = 50660736. Its totient is φ = 14474492.

The previous prime is 28948987. The next prime is 28949003. The reversal of 28948988 is 88984982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3618620 + ... + 3618627.

It is an arithmetic number, because the mean of its divisors is an integer number (8443456).

Almost surely, 228948988 is an apocalyptic number.

It is an amenable number.

28948988 is a deficient number, since it is larger than the sum of its proper divisors (21711748).

28948988 is a wasteful number, since it uses less digits than its factorization.

28948988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237251 (or 7237249 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 56.

The square root of 28948988 is about 5380.4263771564. The cubic root of 28948988 is about 307.0514331310.

The spelling of 28948988 in words is "twenty-eight million, nine hundred forty-eight thousand, nine hundred eighty-eight".

Divisors: 1 2 4 7237247 14474494 28948988