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331407 = 32231601
BaseRepresentation
bin1010000111010001111
3121211121100
41100322033
541101112
611034143
72550126
oct1207217
9554540
10331407
11206a9a
1213b953
13b7acb
1488abd
15682dc
hex50e8f

331407 has 12 divisors (see below), whose sum is σ = 499824. Its totient is φ = 211200.

The previous prime is 331399. The next prime is 331423. The reversal of 331407 is 704133.

It is not a de Polignac number, because 331407 - 23 = 331399 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 331407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (41652).

2331407 is an apocalyptic number.

331407 is a deficient number, since it is larger than the sum of its proper divisors (168417).

331407 is a wasteful number, since it uses less digits than its factorization.

331407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 331407 is about 575.6795983879. The cubic root of 331407 is about 69.2023048226.

The spelling of 331407 in words is "three hundred thirty-one thousand, four hundred seven".

Divisors: 1 3 9 23 69 207 1601 4803 14409 36823 110469 331407