213449890 has 16 divisors (see below), whose sum is σ = 400915008. Its totient is φ = 81667696.

The previous prime is 213449879. The next prime is 213449897. The reversal of 213449890 is 98944312.

It is not an unprimeable number, because it can be changed into a prime (213449897) 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, 463792 + ... + 464251.

It is an arithmetic number, because the mean of its divisors is an integer number (25057188).

Almost surely, 2^213449890 is an apocalyptic number.

213449890 is a deficient number, since it is larger than the sum of its proper divisors (187465118).

213449890 is a wasteful number, since it uses less digits than its factorization.

213449890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928073.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 213449890 is about 14609.9243666762. The cubic root of 213449890 is about 597.6294333951.

The spelling of 213449890 in words is "two hundred thirteen million, four hundred forty-nine thousand, eight hundred ninety".