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128807453 = 1713157839
BaseRepresentation
bin1111010110101…
…11001000011101
322222101002121102
413223113020131
5230433314303
620440442445
73122562635
oct753271035
9288332542
10128807453
1166787a45
1237179425
13208bba38
141316d6c5
15b495288
hex7ad721d

128807453 has 8 divisors (see below), whose sum is σ = 137427840. Its totient is φ = 120303040.

The previous prime is 128807447. The next prime is 128807477. The reversal of 128807453 is 354708821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128807453 - 26 = 128807389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128807053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26693 + ... + 31146.

It is an arithmetic number, because the mean of its divisors is an integer number (17178480).

Almost surely, 2128807453 is an apocalyptic number.

It is an amenable number.

128807453 is a deficient number, since it is larger than the sum of its proper divisors (8620387).

128807453 is a wasteful number, since it uses less digits than its factorization.

128807453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57987.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 128807453 is about 11349.3371172064. The cubic root of 128807453 is about 505.0259150835.

The spelling of 128807453 in words is "one hundred twenty-eight million, eight hundred seven thousand, four hundred fifty-three".

Divisors: 1 17 131 2227 57839 983263 7576909 128807453