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28434156 = 2234157793
BaseRepresentation
bin110110001110…
…1111011101100
31222111121022220
41230131323230
524234343111
62453235340
7463454262
oct154357354
958447286
1028434156
1115061003
129632b50
135b7735a
143ac2432
152769e06
hex1b1deec

28434156 has 24 divisors (see below), whose sum is σ = 67965744. Its totient is φ = 9246720.

The previous prime is 28434143. The next prime is 28434169. The reversal of 28434156 is 65143482.

It is an interprime number because it is at equal distance from previous prime (28434143) and next prime (28434169).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28405 + ... + 29388.

It is an arithmetic number, because the mean of its divisors is an integer number (2831906).

Almost surely, 228434156 is an apocalyptic number.

It is an amenable number.

28434156 is an abundant number, since it is smaller than the sum of its proper divisors (39531588).

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

28434156 is a wasteful number, since it uses less digits than its factorization.

28434156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57841 (or 57839 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 28434156 is about 5332.3687044315. The cubic root of 28434156 is about 305.2203227565.

The spelling of 28434156 in words is "twenty-eight million, four hundred thirty-four thousand, one hundred fifty-six".

Divisors: 1 2 3 4 6 12 41 82 123 164 246 492 57793 115586 173379 231172 346758 693516 2369513 4739026 7108539 9478052 14217078 28434156