87549140 has 24 divisors (see below), whose sum is σ = 210118272. Its totient is φ = 30016800.

The previous prime is 87549139. The next prime is 87549149. The reversal of 87549140 is 4194578.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 87549094 and 87549103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87549149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312536 + ... + 312815.

It is an arithmetic number, because the mean of its divisors is an integer number (8754928).

Almost surely, 2^87549140 is an apocalyptic number.

It is an amenable number.

87549140 is an abundant number, since it is smaller than the sum of its proper divisors (122569132).

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

87549140 is a wasteful number, since it uses less digits than its factorization.

87549140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625367 (or 625365 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 87549140 is about 9356.7697417431. The cubic root of 87549140 is about 444.0350931329.

The spelling of 87549140 in words is "eighty-seven million, five hundred forty-nine thousand, one hundred forty".