87140440 has 16 divisors (see below), whose sum is σ = 196066080. Its totient is φ = 34856160.

The previous prime is 87140413. The next prime is 87140467. The reversal of 87140440 is 4404178.

It is an interprime number because it is at equal distance from previous prime (87140413) and next prime (87140467).

It is a junction number, because it is equal to n+sod(n) for n = 87140399 and 87140408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089216 + ... + 1089295.

It is an arithmetic number, because the mean of its divisors is an integer number (12254130).

Almost surely, 2^87140440 is an apocalyptic number.

It is an amenable number.

87140440 is an abundant number, since it is smaller than the sum of its proper divisors (108925640).

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

87140440 is a wasteful number, since it uses less digits than its factorization.

87140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178522 (or 2178518 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 87140440 is about 9334.9043915832. The cubic root of 87140440 is about 443.3430617020.

The spelling of 87140440 in words is "eighty-seven million, one hundred forty thousand, four hundred forty".