213630870 has 64 divisors (see below), whose sum is σ = 544008960. Its totient is φ = 53539200.

The previous prime is 213630847. The next prime is 213630881. The reversal of 213630870 is 78036312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73240 + ... + 76100.

It is an arithmetic number, because the mean of its divisors is an integer number (8500140).

Almost surely, 2^213630870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213630870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272004480).

213630870 is an abundant number, since it is smaller than the sum of its proper divisors (330378090).

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

213630870 is a wasteful number, since it uses less digits than its factorization.

213630870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 213630870 is about 14616.1167893528. The cubic root of 213630870 is about 597.7982917950.

The spelling of 213630870 in words is "two hundred thirteen million, six hundred thirty thousand, eight hundred seventy".