87461855 has 16 divisors (see below), whose sum is σ = 119677824. Its totient is φ = 60787200.

The previous prime is 87461851. The next prime is 87461863. The reversal of 87461855 is 55816478.

It is a happy number.

It is not a de Polignac number, because 87461855 - 2² = 87461851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87461851) 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, 38471 + ... + 40680.

It is an arithmetic number, because the mean of its divisors is an integer number (7479864).

Almost surely, 2^87461855 is an apocalyptic number.

87461855 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

87461855 is a deficient number, since it is larger than the sum of its proper divisors (32215969).

87461855 is a wasteful number, since it uses less digits than its factorization.

87461855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79186.

The product of its digits is 268800, while the sum is 44.

The square root of 87461855 is about 9352.1043086570. The cubic root of 87461855 is about 443.8874789265.

It can be divided in two parts, 8746 and 1855, that added together give a palindrome (10601).

The spelling of 87461855 in words is "eighty-seven million, four hundred sixty-one thousand, eight hundred fifty-five".