87434138 has 8 divisors (see below), whose sum is σ = 143074080. Its totient is φ = 39742780.

The previous prime is 87434131. The next prime is 87434173. The reversal of 87434138 is 83143478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (87434131) 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 3 ways as a sum of consecutive naturals, for example, 1987118 + ... + 1987161.

It is an arithmetic number, because the mean of its divisors is an integer number (17884260).

Almost surely, 2^87434138 is an apocalyptic number.

87434138 is a deficient number, since it is larger than the sum of its proper divisors (55639942).

87434138 is a wasteful number, since it uses less digits than its factorization.

87434138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974292.

The product of its digits is 64512, while the sum is 38.

The square root of 87434138 is about 9350.6223322301. The cubic root of 87434138 is about 443.8405840864.

The spelling of 87434138 in words is "eighty-seven million, four hundred thirty-four thousand, one hundred thirty-eight".