646447462 has 16 divisors (see below), whose sum is σ = 979985952. Its totient is φ = 319795840.

The previous prime is 646447429. The next prime is 646447463. The reversal of 646447462 is 264744646.

It is a super-2 number, since 2×646447462² = 835788642252482888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646447463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144012 + ... + 148432.

It is an arithmetic number, because the mean of its divisors is an integer number (61249122).

Almost surely, 2^646447462 is an apocalyptic number.

646447462 is a deficient number, since it is larger than the sum of its proper divisors (333538490).

646447462 is a wasteful number, since it uses less digits than its factorization.

646447462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183.

The product of its digits is 774144, while the sum is 43.

The square root of 646447462 is about 25425.3311089551. The cubic root of 646447462 is about 864.6580946847.

The spelling of 646447462 in words is "six hundred forty-six million, four hundred forty-seven thousand, four hundred sixty-two".