87220930 has 8 divisors (see below), whose sum is σ = 156997692. Its totient is φ = 34888368.

The previous prime is 87220921. The next prime is 87220937. The reversal of 87220930 is 3902278.

It can be written as a sum of positive squares in 2 ways, for example, as 86881041 + 339889 = 9321^2 + 583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 87220892 and 87220901.

It is not an unprimeable number, because it can be changed into a prime (87220937) 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, 4361037 + ... + 4361056.

Almost surely, 2^87220930 is an apocalyptic number.

87220930 is a deficient number, since it is larger than the sum of its proper divisors (69776762).

87220930 is a wasteful number, since it uses less digits than its factorization.

87220930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722100.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 87220930 is about 9339.2146350751. The cubic root of 87220930 is about 443.4795222691.

The spelling of 87220930 in words is "eighty-seven million, two hundred twenty thousand, nine hundred thirty".