87388770 has 64 divisors (see below), whose sum is σ = 243311616. Its totient is φ = 19673280.

The previous prime is 87388759. The next prime is 87388781. The reversal of 87388770 is 7788378.

It is an interprime number because it is at equal distance from previous prime (87388759) and next prime (87388781).

It is a super-2 number, since 2×87388770² = 15273594244225800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10965 + ... + 17175.

It is an arithmetic number, because the mean of its divisors is an integer number (3801744).

Almost surely, 2^87388770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87388770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121655808).

87388770 is an abundant number, since it is smaller than the sum of its proper divisors (155922846).

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

87388770 is a wasteful number, since it uses less digits than its factorization.

87388770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295.

The product of its (nonzero) digits is 526848, while the sum is 48.

The square root of 87388770 is about 9348.1960826675. The cubic root of 87388770 is about 443.7638038422.

The spelling of 87388770 in words is "eighty-seven million, three hundred eighty-eight thousand, seven hundred seventy".