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628087427 = 111923193677
BaseRepresentation
bin100101011011111…
…101101010000011
31121202212010222022
4211123331222003
52241242244202
6142154032055
721364440452
oct4533755203
91552763868
10628087427
112a25a2420
1215641862b
13a0181186
145d5b8b99
153a219ea2
hex256fda83

628087427 has 32 divisors (see below), whose sum is σ = 757624320. Its totient is φ = 513976320.

The previous prime is 628087403. The next prime is 628087429. The reversal of 628087427 is 724780826.

It is not a de Polignac number, because 628087427 - 26 = 628087363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628087429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 927413 + ... + 928089.

It is an arithmetic number, because the mean of its divisors is an integer number (23675760).

Almost surely, 2628087427 is an apocalyptic number.

628087427 is a deficient number, since it is larger than the sum of its proper divisors (129536893).

628087427 is a wasteful number, since it uses less digits than its factorization.

628087427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 628087427 is about 25061.6724701286. The cubic root of 628087427 is about 856.3935083883.

The spelling of 628087427 in words is "six hundred twenty-eight million, eighty-seven thousand, four hundred twenty-seven".

Divisors: 1 11 19 23 193 209 253 437 677 2123 3667 4439 4807 7447 12863 15571 40337 48829 84341 130661 141493 171281 295849 927751 1437271 2482559 3005203 3254339 27308149 33057233 57098857 628087427