213420738 has 32 divisors (see below), whose sum is σ = 433420416. Its totient is φ = 70051968.

The previous prime is 213420733. The next prime is 213420743. The reversal of 213420738 is 837024312.

It is an interprime number because it is at equal distance from previous prime (213420733) and next prime (213420743).

It is a super-2 number, since 2×213420738² = 91096822816929288, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213420733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120870 + ... + 122622.

It is an arithmetic number, because the mean of its divisors is an integer number (13544388).

Almost surely, 2^213420738 is an apocalyptic number.

213420738 is an abundant number, since it is smaller than the sum of its proper divisors (219999678).

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

213420738 is a wasteful number, since it uses less digits than its factorization.

213420738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 213420738 is about 14608.9266546177. The cubic root of 213420738 is about 597.6022250006.

The spelling of 213420738 in words is "two hundred thirteen million, four hundred twenty thousand, seven hundred thirty-eight".