87128392782 has 8 divisors (see below), whose sum is σ = 174256785576. Its totient is φ = 29042797592.

The previous prime is 87128392781. The next prime is 87128392783. The reversal of 87128392782 is 28729382178.

It is an interprime number because it is at equal distance from previous prime (87128392781) and next prime (87128392783).

It is a sphenic number, since it is the product of 3 distinct primes.

87128392782 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87128392781) 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, 7260699393 + ... + 7260699404.

It is an arithmetic number, because the mean of its divisors is an integer number (21782098197).

Almost surely, 2^87128392782 is an apocalyptic number.

87128392782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87128392782 is a wasteful number, since it uses less digits than its factorization.

87128392782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14521398802.

The product of its digits is 5419008, while the sum is 57.

The spelling of 87128392782 in words is "eighty-seven billion, one hundred twenty-eight million, three hundred ninety-two thousand, seven hundred eighty-two".