87224052640 has 24 divisors (see below), whose sum is σ = 206066824740. Its totient is φ = 34889620992.

The previous prime is 87224052631. The next prime is 87224052649. The reversal of 87224052640 is 4625042278.

It is an interprime number because it is at equal distance from previous prime (87224052631) and next prime (87224052649).

It can be written as a sum of positive squares in 2 ways, for example, as 87093453456 + 130599184 = 295116^2 + 11428^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 87224052593 and 87224052602.

It is not an unprimeable number, because it can be changed into a prime (87224052649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272575005 + ... + 272575324.

Almost surely, 2^87224052640 is an apocalyptic number.

87224052640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87224052640 is an abundant number, since it is smaller than the sum of its proper divisors (118842772100).

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

87224052640 is a wasteful number, since it uses less digits than its factorization.

87224052640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545150344 (or 545150336 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 87224052640 in words is "eighty-seven billion, two hundred twenty-four million, fifty-two thousand, six hundred forty".