87140340 has 96 divisors (see below), whose sum is σ = 309845760. Its totient is φ = 19916928.

The previous prime is 87140329. The next prime is 87140341. The reversal of 87140340 is 4304178.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87140341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7747 + ... + 15306.

It is an arithmetic number, because the mean of its divisors is an integer number (3227560).

Almost surely, 2^87140340 is an apocalyptic number.

It is an amenable number.

87140340 is an abundant number, since it is smaller than the sum of its proper divisors (222705420).

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

87140340 is a wasteful number, since it uses less digits than its factorization.

87140340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078 (or 23070 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87140340 is about 9334.8990353404. The cubic root of 87140340 is about 443.3428921124.

The spelling of 87140340 in words is "eighty-seven million, one hundred forty thousand, three hundred forty".