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30424431 = 325739461
BaseRepresentation
bin111010000001…
…1110101101111
32010020201110210
41310003311233
530242040211
63004033503
7516413652
oct164036557
963221423
1030424431
11161a0364
12a232893
1363c322b
14407d899
152a0e9a6
hex1d03d6f

30424431 has 8 divisors (see below), whose sum is σ = 40724784. Its totient is φ = 20203520.

The previous prime is 30424411. The next prime is 30424477. The reversal of 30424431 is 13442403.

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

It is a cyclic number.

It is not a de Polignac number, because 30424431 - 25 = 30424399 is a prime.

It is a super-2 number, since 2×304244312 = 1851292003347522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30424398 and 30424407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30424411) 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, 18960 + ... + 20501.

It is an arithmetic number, because the mean of its divisors is an integer number (5090598).

Almost surely, 230424431 is an apocalyptic number.

30424431 is a deficient number, since it is larger than the sum of its proper divisors (10300353).

30424431 is a wasteful number, since it uses less digits than its factorization.

30424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39721.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 30424431 is about 5515.8345696730. The cubic root of 30424431 is about 312.1817337845.

Adding to 30424431 its reverse (13442403), we get a palindrome (43866834).

The spelling of 30424431 in words is "thirty million, four hundred twenty-four thousand, four hundred thirty-one".

Divisors: 1 3 257 771 39461 118383 10141477 30424431