456647978 has 16 divisors (see below), whose sum is σ = 709166880. Its totient is φ = 220271856.

The previous prime is 456647963. The next prime is 456647981. The reversal of 456647978 is 879746654.

It is a super-2 number, since 2×456647978² = 417054751622976968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94325 + ... + 99047.

It is an arithmetic number, because the mean of its divisors is an integer number (44322930).

Almost surely, 2^456647978 is an apocalyptic number.

456647978 is a deficient number, since it is larger than the sum of its proper divisors (252518902).

456647978 is a wasteful number, since it uses less digits than its factorization.

456647978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421.

The product of its digits is 10160640, while the sum is 56.

The square root of 456647978 is about 21369.3232929824. The cubic root of 456647978 is about 770.0646361663.

The spelling of 456647978 in words is "four hundred fifty-six million, six hundred forty-seven thousand, nine hundred seventy-eight".