648774336 has 56 divisors (see below), whose sum is σ = 1961774080. Its totient is φ = 185363712.

The previous prime is 648774331. The next prime is 648774337. The reversal of 648774336 is 633477846.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×648774336³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (648774331) 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, 240016 + ... + 242703.

It is an arithmetic number, because the mean of its divisors is an integer number (35031680).

Almost surely, 2^648774336 is an apocalyptic number.

It is an amenable number.

648774336 is an abundant number, since it is smaller than the sum of its proper divisors (1312999744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648774336 is a wasteful number, since it uses less digits than its factorization.

648774336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482741 (or 482731 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 48.

The square root of 648774336 is about 25471.0489772212. The cubic root of 648774336 is about 865.6942919434.

The spelling of 648774336 in words is "six hundred forty-eight million, seven hundred seventy-four thousand, three hundred thirty-six".