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74728 = 239341
BaseRepresentation
bin10010001111101000
310210111201
4102033220
54342403
61333544
7430603
oct221750
9123451
1074728
1151165
12372b4
1328024
141d33a
151721d
hex123e8

74728 has 8 divisors (see below), whose sum is σ = 140130. Its totient is φ = 37360.

The previous prime is 74719. The next prime is 74729. The reversal of 74728 is 82747.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 6084 = 262^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 74696 and 74705.

It is not an unprimeable number, because it can be changed into a prime (74729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4663 + ... + 4678.

274728 is an apocalyptic number.

It is an amenable number.

74728 is a deficient number, since it is larger than the sum of its proper divisors (65402).

74728 is a wasteful number, since it uses less digits than its factorization.

74728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347 (or 9343 counting only the distinct ones).

The product of its digits is 3136, while the sum is 28.

The square root of 74728 is about 273.3642258965. The cubic root of 74728 is about 42.1205906916.

The spelling of 74728 in words is "seventy-four thousand, seven hundred twenty-eight".

Divisors: 1 2 4 8 9341 18682 37364 74728