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670872 = 23327953
BaseRepresentation
bin10100011110010011000
31021002021010
42203302120
5132431442
622213520
75462616
oct2436230
91232233
10670872
11419044
122842a0
131a6487
141366b6
15d3b9c
hexa3c98

670872 has 16 divisors (see below), whose sum is σ = 1677240. Its totient is φ = 223616.

The previous prime is 670867. The next prime is 670877. The reversal of 670872 is 278076.

It is an interprime number because it is at equal distance from previous prime (670867) and next prime (670877).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670877) by changing a digit.

670872 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, 13953 + ... + 14000.

2670872 is an apocalyptic number.

It is an amenable number.

670872 is an abundant number, since it is smaller than the sum of its proper divisors (1006368).

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

670872 is a wasteful number, since it uses less digits than its factorization.

670872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27962 (or 27958 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 670872 is about 819.0677627645. The cubic root of 670872 is about 87.5413464458.

Adding to 670872 its product of nonzero digits (4704), we get a palindrome (675576).

The spelling of 670872 in words is "six hundred seventy thousand, eight hundred seventy-two".

Divisors: 1 2 3 4 6 8 12 24 27953 55906 83859 111812 167718 223624 335436 670872