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681396 = 22356783
BaseRepresentation
bin10100110010110110100
31021121200220
42212112310
5133301041
622334340
75535402
oct2462664
91247626
10681396
11425a41
1228a3b0
131ab1c1
1413a472
15d6d66
hexa65b4

681396 has 12 divisors (see below), whose sum is σ = 1589952. Its totient is φ = 227128.

The previous prime is 681371. The next prime is 681403. The reversal of 681396 is 693186.

681396 = T100 + T101 + ... + T171.

681396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681396.

It is an unprimeable number.

681396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28380 + ... + 28403.

It is an arithmetic number, because the mean of its divisors is an integer number (132496).

2681396 is an apocalyptic number.

It is an amenable number.

681396 is an abundant number, since it is smaller than the sum of its proper divisors (908556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681396 is a wasteful number, since it uses less digits than its factorization.

681396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56790 (or 56788 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 681396 is about 825.4671404726. The cubic root of 681396 is about 87.9967285285.

The spelling of 681396 in words is "six hundred eighty-one thousand, three hundred ninety-six".

Divisors: 1 2 3 4 6 12 56783 113566 170349 227132 340698 681396