684224402 has 16 divisors (see below), whose sum is σ = 1049172480. Its totient is φ = 334514208.

The previous prime is 684224393. The next prime is 684224413. The reversal of 684224402 is 204422486.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118343 + ... + 123989.

It is an arithmetic number, because the mean of its divisors is an integer number (65573280).

Almost surely, 2^684224402 is an apocalyptic number.

684224402 is a deficient number, since it is larger than the sum of its proper divisors (364948078).

684224402 is a wasteful number, since it uses less digits than its factorization.

684224402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985.

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 684224402 is about 26157.6834218935. The cubic root of 684224402 is about 881.1831545830.

Adding to 684224402 its reverse (204422486), we get a palindrome (888646888).

The spelling of 684224402 in words is "six hundred eighty-four million, two hundred twenty-four thousand, four hundred two".