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190390887 = 32192938393
BaseRepresentation
bin10110101100100…
…10001001100111
3111021020212012100
423112102021213
5342220002022
630520423143
74501203321
oct1326221147
9437225170
10190390887
119851a545
1253917ab3
13305a163b
141b400611
1511aac1ac
hexb592267

190390887 has 24 divisors (see below), whose sum is σ = 299473200. Its totient is φ = 116097408.

The previous prime is 190390877. The next prime is 190390897. The reversal of 190390887 is 788093091.

190390887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (190390877) and next prime (190390897).

It is not a de Polignac number, because 190390887 - 210 = 190389863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190390867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14238 + ... + 24155.

It is an arithmetic number, because the mean of its divisors is an integer number (12478050).

Almost surely, 2190390887 is an apocalyptic number.

190390887 is a deficient number, since it is larger than the sum of its proper divisors (109082313).

190390887 is a wasteful number, since it uses less digits than its factorization.

190390887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38447 (or 38444 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 190390887 is about 13798.2204287365. The cubic root of 190390887 is about 575.2836780450.

The spelling of 190390887 in words is "one hundred ninety million, three hundred ninety thousand, eight hundred eighty-seven".

Divisors: 1 3 9 19 29 57 87 171 261 551 1653 4959 38393 115179 345537 729467 1113397 2188401 3340191 6565203 10020573 21154543 63463629 190390887