213956380 has 48 divisors (see below), whose sum is σ = 495059040. Its totient is φ = 77024000.

The previous prime is 213956377. The next prime is 213956423. The reversal of 213956380 is 83659312.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 17406 + ... + 27034.

It is an arithmetic number, because the mean of its divisors is an integer number (10313730).

Almost surely, 2^213956380 is an apocalyptic number.

213956380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213956380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247529520).

213956380 is an abundant number, since it is smaller than the sum of its proper divisors (281102660).

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

213956380 is a wasteful number, since it uses less digits than its factorization.

213956380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750 (or 9748 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 213956380 is about 14627.2478614400. The cubic root of 213956380 is about 598.1017600678.

The spelling of 213956380 in words is "two hundred thirteen million, nine hundred fifty-six thousand, three hundred eighty".