87928390 has 32 divisors (see below), whose sum is σ = 181751040. Its totient is φ = 30290400.

The previous prime is 87928363. The next prime is 87928397. The reversal of 87928390 is 9382978.

It is a self number, because there is not a number n which added to its sum of digits gives 87928390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87928397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18946 + ... + 23125.

It is an arithmetic number, because the mean of its divisors is an integer number (5679720).

Almost surely, 2^87928390 is an apocalyptic number.

87928390 is an abundant number, since it is smaller than the sum of its proper divisors (93822650).

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

87928390 is a wasteful number, since it uses less digits than its factorization.

87928390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42108.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 87928390 is about 9377.0139170207. The cubic root of 87928390 is about 444.6753344526.

The spelling of 87928390 in words is "eighty-seven million, nine hundred twenty-eight thousand, three hundred ninety".