648297472 has 44 divisors (see below), whose sum is σ = 1302137640. Its totient is φ = 322605056.

The previous prime is 648297469. The next prime is 648297473. The reversal of 648297472 is 274792846.

It is a happy number.

It is a super-2 number, since 2×648297472² = 840579224403181568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648297473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231054 + ... + 233842.

Almost surely, 2^648297472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648297472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651068820).

648297472 is an abundant number, since it is smaller than the sum of its proper divisors (653840168).

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

648297472 is a wasteful number, since it uses less digits than its factorization.

648297472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036 (or 3018 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The square root of 648297472 is about 25461.6863542068. The cubic root of 648297472 is about 865.4821382433.

The spelling of 648297472 in words is "six hundred forty-eight million, two hundred ninety-seven thousand, four hundred seventy-two".