87026381 has 6 divisors (see below), whose sum is σ = 94235850. Its totient is φ = 80331888.

The previous prime is 87026377. The next prime is 87026389. The reversal of 87026381 is 18362078.

It can be written as a sum of positive squares in 3 ways, for example, as 70756 + 86955625 = 266^2 + 9325^2 .

It is not a de Polignac number, because 87026381 - 2² = 87026377 is a prime.

It is a super-2 number, since 2×87026381² = 15147181979914322, 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 (87026389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 257306 + ... + 257643.

It is an arithmetic number, because the mean of its divisors is an integer number (15705975).

Almost surely, 2^87026381 is an apocalyptic number.

It is an amenable number.

87026381 is a deficient number, since it is larger than the sum of its proper divisors (7209469).

87026381 is a wasteful number, since it uses less digits than its factorization.

87026381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514975 (or 514962 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87026381 is about 9328.7931159395. The cubic root of 87026381 is about 443.1495451785.

The spelling of 87026381 in words is "eighty-seven million, twenty-six thousand, three hundred eighty-one".