214881390 has 64 divisors (see below), whose sum is σ = 576313920. Its totient is φ = 56972160.

The previous prime is 214881361. The next prime is 214881391. The reversal of 214881390 is 93188412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214881391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46672 + ... + 51068.

It is an arithmetic number, because the mean of its divisors is an integer number (9004905).

Almost surely, 2^214881390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 214881390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288156960).

214881390 is an abundant number, since it is smaller than the sum of its proper divisors (361432530).

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

214881390 is a wasteful number, since it uses less digits than its factorization.

214881390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594 (or 4588 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 214881390 is about 14658.8331732099. The cubic root of 214881390 is about 598.9624568746.

It can be divided in two parts, 2148 and 81390, that added together give a palindrome (83538).

The spelling of 214881390 in words is "two hundred fourteen million, eight hundred eighty-one thousand, three hundred ninety".