87058820 has 12 divisors (see below), whose sum is σ = 182823564. Its totient is φ = 34823520.

The previous prime is 87058787. The next prime is 87058837. The reversal of 87058820 is 2885078.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 62694724 = 4936^2 + 7918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2176451 + ... + 2176490.

It is an arithmetic number, because the mean of its divisors is an integer number (15235297).

Almost surely, 2^87058820 is an apocalyptic number.

It is an amenable number.

87058820 is an abundant number, since it is smaller than the sum of its proper divisors (95764744).

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

87058820 is a wasteful number, since it uses less digits than its factorization.

87058820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352950 (or 4352948 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 87058820 is about 9330.5316032904. The cubic root of 87058820 is about 443.2045995278.

It can be divided in two parts, 87058 and 820, that added together give a palindrome (87878).

The spelling of 87058820 in words is "eighty-seven million, fifty-eight thousand, eight hundred twenty".