213788738 has 16 divisors (see below), whose sum is σ = 329797440. Its totient is φ = 103864176.

The previous prime is 213788737. The next prime is 213788761. The reversal of 213788738 is 837887312.

It is a happy number.

213788738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213788692 and 213788701.

It is not an unprimeable number, because it can be changed into a prime (213788737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71273 + ... + 74211.

It is an arithmetic number, because the mean of its divisors is an integer number (20612340).

Almost surely, 2^213788738 is an apocalyptic number.

213788738 is a deficient number, since it is larger than the sum of its proper divisors (116008702).

213788738 is a wasteful number, since it uses less digits than its factorization.

213788738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its digits is 451584, while the sum is 47.

The square root of 213788738 is about 14621.5162688416. The cubic root of 213788738 is about 597.9455083213.

The spelling of 213788738 in words is "two hundred thirteen million, seven hundred eighty-eight thousand, seven hundred thirty-eight".