87573940 has 12 divisors (see below), whose sum is σ = 183905316. Its totient is φ = 35029568.

The previous prime is 87573923. The next prime is 87573947. The reversal of 87573940 is 4937578.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33315984 + 54257956 = 5772^2 + 7366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87573947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189329 + ... + 2189368.

It is an arithmetic number, because the mean of its divisors is an integer number (15325443).

Almost surely, 2^87573940 is an apocalyptic number.

It is an amenable number.

87573940 is an abundant number, since it is smaller than the sum of its proper divisors (96331376).

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

87573940 is a wasteful number, since it uses less digits than its factorization.

87573940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378706 (or 4378704 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 87573940 is about 9358.0948915898. The cubic root of 87573940 is about 444.0770163724.

The spelling of 87573940 in words is "eighty-seven million, five hundred seventy-three thousand, nine hundred forty".