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30838025 = 523139791
BaseRepresentation
bin111010110100…
…0110100001001
32011000201211002
41311220310021
530343304100
63020544345
7523055531
oct165506411
964021732
1030838025
1116453079
12a3b20b5
13650956a
14414a4c1
152a922d5
hex1d68d09

30838025 has 12 divisors (see below), whose sum is σ = 39473664. Its totient is φ = 23874000.

The previous prime is 30838019. The next prime is 30838033. The reversal of 30838025 is 52083803.

It is not a de Polignac number, because 30838025 - 214 = 30821641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19121 + ... + 20670.

It is an arithmetic number, because the mean of its divisors is an integer number (3289472).

Almost surely, 230838025 is an apocalyptic number.

It is an amenable number.

30838025 is a deficient number, since it is larger than the sum of its proper divisors (8635639).

30838025 is a wasteful number, since it uses less digits than its factorization.

30838025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39832 (or 39827 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30838025 is about 5553.1995281999. The cubic root of 30838025 is about 313.5899857592.

The spelling of 30838025 in words is "thirty million, eight hundred thirty-eight thousand, twenty-five".

Divisors: 1 5 25 31 155 775 39791 198955 994775 1233521 6167605 30838025