648784374 has 32 divisors (see below), whose sum is σ = 1560986880. Its totient is φ = 175610592.

The previous prime is 648784373. The next prime is 648784463. The reversal of 648784374 is 473487846.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648784373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405709 + ... + 407304.

It is an arithmetic number, because the mean of its divisors is an integer number (48780840).

Almost surely, 2^648784374 is an apocalyptic number.

648784374 is an abundant number, since it is smaller than the sum of its proper divisors (912202506).

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

648784374 is a wasteful number, since it uses less digits than its factorization.

648784374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813044.

The product of its digits is 3612672, while the sum is 51.

The square root of 648784374 is about 25471.2460237029. The cubic root of 648784374 is about 865.6987566672.

The spelling of 648784374 in words is "six hundred forty-eight million, seven hundred eighty-four thousand, three hundred seventy-four".