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28449902 = 2131796113
BaseRepresentation
bin110110010000…
…1110001101110
31222112101221002
41230201301232
524240344102
62453440302
7463551215
oct154416156
958471832
1028449902
1115071918
129640092
135b81580
143ac807c
15276e902
hex1b21c6e

28449902 has 16 divisors (see below), whose sum is σ = 46221840. Its totient is φ = 13055232.

The previous prime is 28449893. The next prime is 28449907. The reversal of 28449902 is 20994482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28449907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (2888865).

Almost surely, 228449902 is an apocalyptic number.

28449902 is a deficient number, since it is larger than the sum of its proper divisors (17771938).

28449902 is a wasteful number, since it uses less digits than its factorization.

28449902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28449902 is about 5333.8449546270. The cubic root of 28449902 is about 305.2766530415.

The spelling of 28449902 in words is "twenty-eight million, four hundred forty-nine thousand, nine hundred two".

Divisors: 1 2 13 26 179 358 2327 4654 6113 12226 79469 158938 1094227 2188454 14224951 28449902