213903408 has 30 divisors (see below), whose sum is σ = 552845692. Its totient is φ = 71267360.

The previous prime is 213903397. The next prime is 213903409. The reversal of 213903408 is 804309312.

It is not an unprimeable number, because it can be changed into a prime (213903409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100273 + ... + 102383.

Almost surely, 2^213903408 is an apocalyptic number.

It is an amenable number.

213903408 is an abundant number, since it is smaller than the sum of its proper divisors (338942284).

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

213903408 is an frugal number, since it uses more digits than its factorization.

213903408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 213903408 is about 14625.4370191116. The cubic root of 213903408 is about 598.0523960160.

The spelling of 213903408 in words is "two hundred thirteen million, nine hundred three thousand, four hundred eight".