87140442 has 32 divisors (see below), whose sum is σ = 180486144. Its totient is φ = 28018800.

The previous prime is 87140413. The next prime is 87140467. The reversal of 87140442 is 24404178.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79623 + ... + 80709.

It is an arithmetic number, because the mean of its divisors is an integer number (5640192).

Almost surely, 2^87140442 is an apocalyptic number.

87140442 is an abundant number, since it is smaller than the sum of its proper divisors (93345702).

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

87140442 is a wasteful number, since it uses less digits than its factorization.

87140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 87140442 is about 9334.9044987081. The cubic root of 87140442 is about 443.3430650938.

The spelling of 87140442 in words is "eighty-seven million, one hundred forty thousand, four hundred forty-two".