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30430399 = 61498859
BaseRepresentation
bin111010000010…
…1010010111111
32010021000122211
41310011102333
530242233044
63004121251
7516440236
oct164052277
963230584
1030430399
11161a489a
12a236227
1363c5b6c
144081b1d
152a11634
hex1d054bf

30430399 has 4 divisors (see below), whose sum is σ = 30929320. Its totient is φ = 29931480.

The previous prime is 30430349. The next prime is 30430409. The reversal of 30430399 is 99303403.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30430399 - 27 = 30430271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30430399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30430339) 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, 249369 + ... + 249490.

It is an arithmetic number, because the mean of its divisors is an integer number (7732330).

Almost surely, 230430399 is an apocalyptic number.

30430399 is a deficient number, since it is larger than the sum of its proper divisors (498921).

30430399 is an equidigital number, since it uses as much as digits as its factorization.

30430399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498920.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 30430399 is about 5516.3755310892. The cubic root of 30430399 is about 312.2021447801.

It can be divided in two parts, 304 and 30399, that added together give a palindrome (30703).

The spelling of 30430399 in words is "thirty million, four hundred thirty thousand, three hundred ninety-nine".

Divisors: 1 61 498859 30430399