87553420 has 12 divisors (see below), whose sum is σ = 183862224. Its totient is φ = 35021360.

The previous prime is 87553391. The next prime is 87553423. The reversal of 87553420 is 2435578.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87553423) 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, 2188816 + ... + 2188855.

It is an arithmetic number, because the mean of its divisors is an integer number (15321852).

Almost surely, 2^87553420 is an apocalyptic number.

It is an amenable number.

87553420 is an abundant number, since it is smaller than the sum of its proper divisors (96308804).

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

87553420 is a wasteful number, since it uses less digits than its factorization.

87553420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377680 (or 4377678 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 87553420 is about 9356.9984503579. The cubic root of 87553420 is about 444.0423288379.

Adding to 87553420 its reverse (2435578), we get a palindrome (89988998).

The spelling of 87553420 in words is "eighty-seven million, five hundred fifty-three thousand, four hundred twenty".