87791598 has 24 divisors (see below), whose sum is σ = 198486288. Its totient is φ = 27991392.

The previous prime is 87791593. The next prime is 87791603. The reversal of 87791598 is 89519778.

It is an interprime number because it is at equal distance from previous prime (87791593) and next prime (87791603).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87791593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105615 + ... + 106442.

It is an arithmetic number, because the mean of its divisors is an integer number (8270262).

Almost surely, 2^87791598 is an apocalyptic number.

87791598 is an abundant number, since it is smaller than the sum of its proper divisors (110694690).

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

87791598 is a wasteful number, since it uses less digits than its factorization.

87791598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212088 (or 212085 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 87791598 is about 9369.7170715022. The cubic root of 87791598 is about 444.4446179212. Note that the first 3 decimals are identical.

The spelling of 87791598 in words is "eighty-seven million, seven hundred ninety-one thousand, five hundred ninety-eight".