87490140 has 24 divisors (see below), whose sum is σ = 244972560. Its totient is φ = 23330688.

The previous prime is 87490111. The next prime is 87490159. The reversal of 87490140 is 4109478.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 729025 + ... + 729144.

It is an arithmetic number, because the mean of its divisors is an integer number (10207190).

Almost surely, 2^87490140 is an apocalyptic number.

It is an amenable number.

87490140 is an abundant number, since it is smaller than the sum of its proper divisors (157482420).

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

87490140 is a wasteful number, since it uses less digits than its factorization.

87490140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458181 (or 1458179 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 87490140 is about 9353.6164129175. The cubic root of 87490140 is about 443.9353245621.

The spelling of 87490140 in words is "eighty-seven million, four hundred ninety thousand, one hundred forty".