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247492 = 2278839
BaseRepresentation
bin111100011011000100
3110120111101
4330123010
530404432
65145444
72050360
oct743304
9416441
10247492
11159a43
12bb284
138885b
14662a0
154d4e7
hex3c6c4

247492 has 12 divisors (see below), whose sum is σ = 495040. Its totient is φ = 106056.

The previous prime is 247463. The next prime is 247501. The reversal of 247492 is 294742.

247492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

247492 is an admirable number.

It is a super-2 number, since 2×2474922 = 122504580128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 8839 = 247492 / (2 + 4 + 7 + 4 + 9 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 247492.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4392 + ... + 4447.

2247492 is an apocalyptic number.

It is an amenable number.

247492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

247492 is a wasteful number, since it uses less digits than its factorization.

247492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8850 (or 8848 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 247492 is about 497.4856781858. The cubic root of 247492 is about 62.7846852996.

The spelling of 247492 in words is "two hundred forty-seven thousand, four hundred ninety-two".

Divisors: 1 2 4 7 14 28 8839 17678 35356 61873 123746 247492