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61448 = 237681
BaseRepresentation
bin1111000000001000
310010021212
433000020
53431243
61152252
7344102
oct170010
9103255
1061448
1142192
122b688
1321c7a
1418572
1513318
hexf008

61448 has 8 divisors (see below), whose sum is σ = 115230. Its totient is φ = 30720.

The previous prime is 61441. The next prime is 61463. The reversal of 61448 is 84416.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47524 + 13924 = 218^2 + 118^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61441) by changing a digit.

61448 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833 + ... + 3848.

261448 is an apocalyptic number.

It is an amenable number.

61448 is a deficient number, since it is larger than the sum of its proper divisors (53782).

61448 is a wasteful number, since it uses less digits than its factorization.

61448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7687 (or 7683 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 61448 is about 247.8870710626. The cubic root of 61448 is about 39.4611057622.

Subtracting from 61448 its sum of digits (23), we obtain a triangular number (61425 = T350).

The spelling of 61448 in words is "sixty-one thousand, four hundred forty-eight".

Divisors: 1 2 4 8 7681 15362 30724 61448