648378372 has 36 divisors (see below), whose sum is σ = 1581535760. Its totient is φ = 206727312.

The previous prime is 648378337. The next prime is 648378383. The reversal of 648378372 is 273873846.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44722 + ... + 57417.

Almost surely, 2^648378372 is an apocalyptic number.

It is an amenable number.

648378372 is an abundant number, since it is smaller than the sum of its proper divisors (933157388).

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

648378372 is a wasteful number, since it uses less digits than its factorization.

648378372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102192 (or 102167 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The square root of 648378372 is about 25463.2749661154. The cubic root of 648378372 is about 865.5181374544.

The spelling of 648378372 in words is "six hundred forty-eight million, three hundred seventy-eight thousand, three hundred seventy-two".