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128308 = 2232077
BaseRepresentation
bin11111010100110100
320112000011
4133110310
513101213
62430004
71043035
oct372464
9215004
10128308
1188444
1262304
134652b
1434a8c
152803d
hex1f534

128308 has 6 divisors (see below), whose sum is σ = 224546. Its totient is φ = 64152.

The previous prime is 128291. The next prime is 128311. The reversal of 128308 is 803821.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 144 = 358^2 + 12^2 .

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16035 + ... + 16042.

2128308 is an apocalyptic number.

It is an amenable number.

128308 is a deficient number, since it is larger than the sum of its proper divisors (96238).

128308 is a wasteful number, since it uses less digits than its factorization.

128308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32081 (or 32079 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 128308 is about 358.2010608583. The cubic root of 128308 is about 50.4372320839.

The spelling of 128308 in words is "one hundred twenty-eight thousand, three hundred eight".

Divisors: 1 2 4 32077 64154 128308