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689087070 = 232571093789
BaseRepresentation
bin101001000100101…
…010001001011110
31210000122020202100
4221010222021132
52402401241240
6152213305530
723035100130
oct5104521136
91700566670
10689087070
11323a76351
121729352a6
13ac9bb139
1467737050
1540768e30
hex2912a25e

689087070 has 48 divisors (see below), whose sum is σ = 2047574880. Its totient is φ = 157505472.

The previous prime is 689087057. The next prime is 689087071. The reversal of 689087070 is 70780986.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689087071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546265 + ... + 547524.

It is an arithmetic number, because the mean of its divisors is an integer number (42657810).

Almost surely, 2689087070 is an apocalyptic number.

689087070 is an abundant number, since it is smaller than the sum of its proper divisors (1358487810).

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

689087070 is a wasteful number, since it uses less digits than its factorization.

689087070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093809 (or 1093806 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 689087070 is about 26250.4679958282. The cubic root of 689087070 is about 883.2657025077.

The spelling of 689087070 in words is "six hundred eighty-nine million, eighty-seven thousand, seventy".