394372224 has 48 divisors (see below), whose sum is σ = 1134850470. Its totient is φ = 131457024.

The previous prime is 394372217. The next prime is 394372241. The reversal of 394372224 is 422273493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 382593600 + 11778624 = 19560^2 + 3432^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 170017 + ... + 172320.

Almost surely, 2^394372224 is an apocalyptic number.

It is an amenable number.

394372224 is an abundant number, since it is smaller than the sum of its proper divisors (740478246).

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

394372224 is a wasteful number, since it uses less digits than its factorization.

394372224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342357 (or 342342 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 394372224 is about 19858.8072149361. The cubic root of 394372224 is about 733.3344822755.

It can be divided in two parts, 3943 and 72224, that added together give a palindrome (76167).

The spelling of 394372224 in words is "three hundred ninety-four million, three hundred seventy-two thousand, two hundred twenty-four".