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87262813 = 1173271401
BaseRepresentation
bin1010011001110…
…00011001011101
320002012102002001
411030320121131
5134314402223
612354202301
72106502351
oct514703135
9202172061
1087262813
1145291930
1225283391
1315104101
14b837461
1579da9ad
hex533865d

87262813 has 16 divisors (see below), whose sum is σ = 97097472. Its totient is φ = 77760000.

The previous prime is 87262787. The next prime is 87262817. The reversal of 87262813 is 31826278.

It is a cyclic number.

It is not a de Polignac number, because 87262813 - 217 = 87131741 is a prime.

It is a super-2 number, since 2×872628132 = 15229597065345938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87262817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217413 + ... + 217813.

It is an arithmetic number, because the mean of its divisors is an integer number (6068592).

Almost surely, 287262813 is an apocalyptic number.

It is an amenable number.

87262813 is a deficient number, since it is larger than the sum of its proper divisors (9834659).

87262813 is a wasteful number, since it uses less digits than its factorization.

87262813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 32256, while the sum is 37.

The square root of 87262813 is about 9341.4566851214. The cubic root of 87262813 is about 443.5504963672.

The spelling of 87262813 in words is "eighty-seven million, two hundred sixty-two thousand, eight hundred thirteen".

Divisors: 1 11 73 271 401 803 2981 4411 19783 29273 108671 217613 322003 1195381 7932983 87262813