87132091388 has 24 divisors (see below), whose sum is σ = 152714749824. Its totient is φ = 43499358000.

The previous prime is 87132091381. The next prime is 87132091391. The reversal of 87132091388 is 88319023178.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87132091381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8768783 + ... + 8778713.

It is an arithmetic number, because the mean of its divisors is an integer number (6363114576).

Almost surely, 2^87132091388 is an apocalyptic number.

It is an amenable number.

87132091388 is a deficient number, since it is larger than the sum of its proper divisors (65582658436).

87132091388 is a wasteful number, since it uses less digits than its factorization.

87132091388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13073 (or 13071 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 87132091388 in words is "eighty-seven billion, one hundred thirty-two million, ninety-one thousand, three hundred eighty-eight".