213799428 has 36 divisors (see below), whose sum is σ = 551940480. Its totient is φ = 69749616.

The previous prime is 213799427. The next prime is 213799459. The reversal of 213799428 is 824997312.

213799428 is a `hidden beast` number, since 2 + 137 + 99 + 428 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (213799423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61488 + ... + 64871.

It is an arithmetic number, because the mean of its divisors is an integer number (15331680).

Almost surely, 2^213799428 is an apocalyptic number.

It is an amenable number.

213799428 is an abundant number, since it is smaller than the sum of its proper divisors (338141052).

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

213799428 is a wasteful number, since it uses less digits than its factorization.

213799428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126416 (or 126411 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 213799428 is about 14621.8818214346. The cubic root of 213799428 is about 597.9554744386.

The spelling of 213799428 in words is "two hundred thirteen million, seven hundred ninety-nine thousand, four hundred twenty-eight".