87431800 has 24 divisors (see below), whose sum is σ = 203279400. Its totient is φ = 34972640.

The previous prime is 87431789. The next prime is 87431801. The reversal of 87431800 is 813478.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87431801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218380 + ... + 218779.

It is an arithmetic number, because the mean of its divisors is an integer number (8469975).

Almost surely, 2^87431800 is an apocalyptic number.

It is an amenable number.

87431800 is an abundant number, since it is smaller than the sum of its proper divisors (115847600).

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

87431800 is a wasteful number, since it uses less digits than its factorization.

87431800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437175 (or 437166 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 87431800 is about 9350.4973129775. The cubic root of 87431800 is about 443.8366279332.

The spelling of 87431800 in words is "eighty-seven million, four hundred thirty-one thousand, eight hundred".