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30830141 = 191622639
BaseRepresentation
bin111010110011…
…0111000111101
32011000100000002
41311212320331
530343031031
63020444045
7523023536
oct165467075
964010002
1030830141
1116448161
12a3a9625
136505ab4
14414768d
152a8eccb
hex1d66e3d

30830141 has 4 divisors (see below), whose sum is σ = 32452800. Its totient is φ = 29207484.

The previous prime is 30830131. The next prime is 30830147. The reversal of 30830141 is 14103803.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30830141 - 26 = 30830077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30830147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811301 + ... + 811338.

It is an arithmetic number, because the mean of its divisors is an integer number (8113200).

Almost surely, 230830141 is an apocalyptic number.

It is an amenable number.

30830141 is a deficient number, since it is larger than the sum of its proper divisors (1622659).

30830141 is a wasteful number, since it uses less digits than its factorization.

30830141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622658.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30830141 is about 5552.4896217823. The cubic root of 30830141 is about 313.5632595105.

Adding to 30830141 its reverse (14103803), we get a palindrome (44933944).

The spelling of 30830141 in words is "thirty million, eight hundred thirty thousand, one hundred forty-one".

Divisors: 1 19 1622639 30830141