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87444012 = 2237287001
BaseRepresentation
bin1010011011001…
…00101000101100
320002112121122010
411031210220230
5134341202022
612402121220
72111155545
oct515445054
9202477563
1087444012
11453a5a87
1225350210
1315168726
14b8834cc
157a2450c
hex5364a2c

87444012 has 12 divisors (see below), whose sum is σ = 204036056. Its totient is φ = 29148000.

The previous prime is 87443981. The next prime is 87444029. The reversal of 87444012 is 21044478.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×874440122 = 15292910469312288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643489 + ... + 3643512.

Almost surely, 287444012 is an apocalyptic number.

It is an amenable number.

87444012 is an abundant number, since it is smaller than the sum of its proper divisors (116592044).

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

87444012 is a wasteful number, since it uses less digits than its factorization.

87444012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287008 (or 7287006 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 87444012 is about 9351.1503035723. The cubic root of 87444012 is about 443.8572912028.

The spelling of 87444012 in words is "eighty-seven million, four hundred forty-four thousand, twelve".

Divisors: 1 2 3 4 6 12 7287001 14574002 21861003 29148004 43722006 87444012