87081040 has 40 divisors (see below), whose sum is σ = 202987008. Its totient is φ = 34742400.

The previous prime is 87081037. The next prime is 87081053. The reversal of 87081040 is 4018078.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35865 + ... + 38215.

Almost surely, 2^87081040 is an apocalyptic number.

87081040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87081040 is an abundant number, since it is smaller than the sum of its proper divisors (115905968).

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

87081040 is a wasteful number, since it uses less digits than its factorization.

87081040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 87081040 is about 9331.7222419015. The cubic root of 87081040 is about 443.2423026519.

The spelling of 87081040 in words is "eighty-seven million, eighty-one thousand, forty".