213894890 has 16 divisors (see below), whose sum is σ = 420012000. Its totient is φ = 77779920.

The previous prime is 213894881. The next prime is 213894893. The reversal of 213894890 is 98498312.

It is a happy number.

It is a super-2 number, since 2×213894890² = 91502047936224200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213894893) 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, 972140 + ... + 972359.

It is an arithmetic number, because the mean of its divisors is an integer number (26250750).

Almost surely, 2^213894890 is an apocalyptic number.

213894890 is a deficient number, since it is larger than the sum of its proper divisors (206117110).

213894890 is a wasteful number, since it uses less digits than its factorization.

213894890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944517.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 213894890 is about 14625.1458112389. The cubic root of 213894890 is about 598.0444574204.

The spelling of 213894890 in words is "two hundred thirteen million, eight hundred ninety-four thousand, eight hundred ninety".