87497658 has 60 divisors (see below), whose sum is σ = 205155258. Its totient is φ = 27870480.

The previous prime is 87497621. The next prime is 87497659. The reversal of 87497658 is 85679478.

It can be written as a sum of positive squares in only one way, i.e., 72029169 + 15468489 = 8487^2 + 3933^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (87497659) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 85188 + ... + 86208.

Almost surely, 2^87497658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87497658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102577629).

87497658 is an abundant number, since it is smaller than the sum of its proper divisors (117657600).

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

87497658 is a wasteful number, since it uses less digits than its factorization.

87497658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1049 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 87497658 is about 9354.0182809315. The cubic root of 87497658 is about 443.9480399385.

The spelling of 87497658 in words is "eighty-seven million, four hundred ninety-seven thousand, six hundred fifty-eight".