648457894 has 32 divisors (see below), whose sum is σ = 1179035136. Its totient is φ = 261118080.

The previous prime is 648457879. The next prime is 648457903. The reversal of 648457894 is 498754846.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162487 + ... + 166429.

It is an arithmetic number, because the mean of its divisors is an integer number (36844848).

Almost surely, 2^648457894 is an apocalyptic number.

648457894 is a deficient number, since it is larger than the sum of its proper divisors (530577242).

648457894 is a wasteful number, since it uses less digits than its factorization.

648457894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660.

The product of its digits is 7741440, while the sum is 55.

The square root of 648457894 is about 25464.8364220154. The cubic root of 648457894 is about 865.5535205592.

The spelling of 648457894 in words is "six hundred forty-eight million, four hundred fifty-seven thousand, eight hundred ninety-four".