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47628457 = 173275309
BaseRepresentation
bin1011010110110…
…0000010101001
310022121202221221
42311230002221
544143102312
64420502041
71115556322
oct265540251
9108552857
1047628457
1124980a68
1213b4a921
139b37b26
14647b449
1542ac207
hex2d6c0a9

47628457 has 4 divisors (see below), whose sum is σ = 47903940. Its totient is φ = 47352976.

The previous prime is 47628403. The next prime is 47628463. The reversal of 47628457 is 75482674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75482674 = 237741337.

It can be written as a sum of positive squares in 2 ways, for example, as 27342441 + 20286016 = 5229^2 + 4504^2 .

It is a cyclic number.

It is not a de Polignac number, because 47628457 - 215 = 47595689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47628467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137482 + ... + 137827.

It is an arithmetic number, because the mean of its divisors is an integer number (11975985).

Almost surely, 247628457 is an apocalyptic number.

It is an amenable number.

47628457 is a deficient number, since it is larger than the sum of its proper divisors (275483).

47628457 is a wasteful number, since it uses less digits than its factorization.

47628457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275482.

The product of its digits is 376320, while the sum is 43.

The square root of 47628457 is about 6901.3373341694. The cubic root of 47628457 is about 362.4839964397.

The spelling of 47628457 in words is "forty-seven million, six hundred twenty-eight thousand, four hundred fifty-seven".

Divisors: 1 173 275309 47628457