648889479 has 24 divisors (see below), whose sum is σ = 1096098432. Its totient is φ = 362169360.

The previous prime is 648889469. The next prime is 648889511. The reversal of 648889479 is 974988846.

648889479 is a `hidden beast` number, since 6 + 4 + 88 + 89 + 479 = 666.

It is not a de Polignac number, because 648889479 - 2⁵ = 648889447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648889469) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117057 + ... + 122474.

It is an arithmetic number, because the mean of its divisors is an integer number (45670768).

Almost surely, 2^648889479 is an apocalyptic number.

648889479 is a deficient number, since it is larger than the sum of its proper divisors (447208953).

648889479 is a wasteful number, since it uses less digits than its factorization.

648889479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239587 (or 239584 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 648889479 is about 25473.3091489897. The cubic root of 648889479 is about 865.7455027348.

The spelling of 648889479 in words is "six hundred forty-eight million, eight hundred eighty-nine thousand, four hundred seventy-nine".