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86943780 = 223457111741
BaseRepresentation
bin1010010111010…
…10100000100100
320001121012110000
411023222200210
5134224200110
612343301300
72104003260
oct513524044
9201535400
1086943780
1145094170
122514a830
1315021b31
14b7930a0
1579761c0
hex52ea824

86943780 has 480 divisors, whose sum is σ = 368831232. Its totient is φ = 16588800.

The previous prime is 86943767. The next prime is 86943811. The reversal of 86943780 is 8734968.

It is a happy number.

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

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 615 × 561 × 252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2120560 + ... + 2120600.

Almost surely, 286943780 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 86943780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184415616).

86943780 is an abundant number, since it is smaller than the sum of its proper divisors (281887452).

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

86943780 is a wasteful number, since it uses less digits than its factorization.

86943780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 86943780 is about 9324.3648577262. The cubic root of 86943780 is about 443.0092958183.

The spelling of 86943780 in words is "eighty-six million, nine hundred forty-three thousand, seven hundred eighty".