87261822 has 24 divisors (see below), whose sum is σ = 189796464. Its totient is φ = 28975104.

The previous prime is 87261821. The next prime is 87261829. The reversal of 87261822 is 22816278.

It is a happy number.

It is a super-2 number, since 2×87261822² = 15229251157519368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87261821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4483 + ... + 13950.

It is an arithmetic number, because the mean of its divisors is an integer number (7908186).

Almost surely, 2^87261822 is an apocalyptic number.

87261822 is an abundant number, since it is smaller than the sum of its proper divisors (102534642).

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

87261822 is a wasteful number, since it uses less digits than its factorization.

87261822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18704 (or 18701 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 87261822 is about 9341.4036418517. The cubic root of 87261822 is about 443.5488173007.

The spelling of 87261822 in words is "eighty-seven million, two hundred sixty-one thousand, eight hundred twenty-two".