87261738 has 16 divisors (see below), whose sum is σ = 177129120. Its totient is φ = 28652976.

The previous prime is 87261709. The next prime is 87261743. The reversal of 87261738 is 83716278.

It is a super-2 number, since 2×87261738² = 15229221837561288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87261738.

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 7 ways as a sum of consecutive naturals, for example, 108133 + ... + 108936.

It is an arithmetic number, because the mean of its divisors is an integer number (11070570).

Almost surely, 2^87261738 is an apocalyptic number.

87261738 is an abundant number, since it is smaller than the sum of its proper divisors (89867382).

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

87261738 is a wasteful number, since it uses less digits than its factorization.

87261738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217141.

The product of its digits is 112896, while the sum is 42.

The square root of 87261738 is about 9341.3991457383. The cubic root of 87261738 is about 443.5486749776.

The spelling of 87261738 in words is "eighty-seven million, two hundred sixty-one thousand, seven hundred thirty-eight".