212447394 has 32 divisors (see below), whose sum is σ = 473330880. Its totient is φ = 70632000.

The previous prime is 212447393. The next prime is 212447399. The reversal of 212447394 is 493744212.

212447394 is a `hidden beast` number, since 21 + 244 + 7 + 394 = 666.

It is not an unprimeable number, because it can be changed into a prime (212447393) 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, 16749 + ... + 26559.

It is an arithmetic number, because the mean of its divisors is an integer number (14791590).

Almost surely, 2^212447394 is an apocalyptic number.

212447394 is an abundant number, since it is smaller than the sum of its proper divisors (260883486).

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

212447394 is a wasteful number, since it uses less digits than its factorization.

212447394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10223 (or 10217 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 212447394 is about 14575.5752545140. The cubic root of 212447394 is about 596.6923492512.

The spelling of 212447394 in words is "two hundred twelve million, four hundred forty-seven thousand, three hundred ninety-four".