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30865145 = 514594231
BaseRepresentation
bin111010110111…
…1011011111001
32011002010000112
41311233123321
530400141040
63021314105
7523230563
oct165573371
964063015
1030865145
1116471493
12a405935
1365189cc
144156333
152a9a365
hex1d6f6f9

30865145 has 8 divisors (see below), whose sum is σ = 37072320. Its totient is φ = 24669360.

The previous prime is 30865123. The next prime is 30865147. The reversal of 30865145 is 54156803.

It is a happy number.

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

It is not a de Polignac number, because 30865145 - 210 = 30864121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30865147) 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, 5180 + ... + 9410.

It is an arithmetic number, because the mean of its divisors is an integer number (4634040).

Almost surely, 230865145 is an apocalyptic number.

It is an amenable number.

30865145 is a deficient number, since it is larger than the sum of its proper divisors (6207175).

30865145 is a wasteful number, since it uses less digits than its factorization.

30865145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5695.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 30865145 is about 5555.6408271234. The cubic root of 30865145 is about 313.6818860302.

The spelling of 30865145 in words is "thirty million, eight hundred sixty-five thousand, one hundred forty-five".

Divisors: 1 5 1459 4231 7295 21155 6173029 30865145