Search a number
-
+
70432 = 253171
BaseRepresentation
bin10001001100100000
310120121121
4101030200
54223212
61302024
7412225
oct211440
9116547
1070432
1148a0a
1234914
132609b
141b94c
1515d07
hex11320

70432 has 24 divisors (see below), whose sum is σ = 145152. Its totient is φ = 33600.

The previous prime is 70429. The next prime is 70439. The reversal of 70432 is 23407.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70439) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 957 + ... + 1027.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

270432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72576).

70432 is an abundant number, since it is smaller than the sum of its proper divisors (74720).

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

70432 is a wasteful number, since it uses less digits than its factorization.

70432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 70432 is about 265.3902786464. The cubic root of 70432 is about 41.2974599137.

Adding to 70432 its reverse (23407), we get a palindrome (93839).

The spelling of 70432 in words is "seventy thousand, four hundred thirty-two".

Divisors: 1 2 4 8 16 31 32 62 71 124 142 248 284 496 568 992 1136 2201 2272 4402 8804 17608 35216 70432