87388490 has 16 divisors (see below), whose sum is σ = 179770752. Its totient is φ = 29961744.

The previous prime is 87388453. The next prime is 87388501. The reversal of 87388490 is 9488378.

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 7 ways as a sum of consecutive naturals, for example, 624134 + ... + 624273.

It is an arithmetic number, because the mean of its divisors is an integer number (11235672).

Almost surely, 2^87388490 is an apocalyptic number.

87388490 is an abundant number, since it is smaller than the sum of its proper divisors (92382262).

87388490 is a wasteful number, since it uses less digits than its factorization.

87388490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248421.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 87388490 is about 9348.1811065041. The cubic root of 87388490 is about 443.7633298912.

It can be divided in two parts, 87388 and 490, that added together give a palindrome (87878).

The spelling of 87388490 in words is "eighty-seven million, three hundred eighty-eight thousand, four hundred ninety".