87060640 has 24 divisors (see below), whose sum is σ = 205681140. Its totient is φ = 34824192.

The previous prime is 87060619. The next prime is 87060643. The reversal of 87060640 is 4606078.

It can be written as a sum of positive squares in 2 ways, for example, as 84713616 + 2347024 = 9204^2 + 1532^2 .

It is not an unprimeable number, because it can be changed into a prime (87060643) 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, 271905 + ... + 272224.

Almost surely, 2^87060640 is an apocalyptic number.

87060640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87060640 is an abundant number, since it is smaller than the sum of its proper divisors (118620500).

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

87060640 is a wasteful number, since it uses less digits than its factorization.

87060640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544144 (or 544136 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 87060640 is about 9330.6291320575. The cubic root of 87060640 is about 443.2076879637.

The spelling of 87060640 in words is "eighty-seven million, sixty thousand, six hundred forty".