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230397477 = 31917832267
BaseRepresentation
bin11011011101110…
…01011000100101
3121001112101220220
431232321120211
5432440204402
634510114553
75465226522
oct1556713045
9531471826
10230397477
11109065042
12651aba59
133896b18b
1422856149
1515360dbc
hexdbb9625

230397477 has 16 divisors (see below), whose sum is σ = 323688960. Its totient is φ = 145368432.

The previous prime is 230397469. The next prime is 230397493. The reversal of 230397477 is 774793032.

It is not a de Polignac number, because 230397477 - 23 = 230397469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230397457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100498 + ... + 102764.

It is an arithmetic number, because the mean of its divisors is an integer number (20230560).

Almost surely, 2230397477 is an apocalyptic number.

It is an amenable number.

230397477 is a deficient number, since it is larger than the sum of its proper divisors (93291483).

230397477 is a wasteful number, since it uses less digits than its factorization.

230397477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072.

The product of its (nonzero) digits is 222264, while the sum is 42.

The square root of 230397477 is about 15178.8496599709. The cubic root of 230397477 is about 613.0453081767.

The spelling of 230397477 in words is "two hundred thirty million, three hundred ninety-seven thousand, four hundred seventy-seven".

Divisors: 1 3 19 57 1783 2267 5349 6801 33877 43073 101631 129219 4042061 12126183 76799159 230397477