648693380 has 24 divisors (see below), whose sum is σ = 1421485632. Its totient is φ = 248195552.

The previous prime is 648693379. The next prime is 648693391. The reversal of 648693380 is 83396846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704642 + ... + 705561.

It is an arithmetic number, because the mean of its divisors is an integer number (59228568).

Almost surely, 2^648693380 is an apocalyptic number.

It is an amenable number.

648693380 is an abundant number, since it is smaller than the sum of its proper divisors (772792252).

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

648693380 is a wasteful number, since it uses less digits than its factorization.

648693380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410235 (or 1410233 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 648693380 is about 25469.4597508467. The cubic root of 648693380 is about 865.6582824722.

The spelling of 648693380 in words is "six hundred forty-eight million, six hundred ninety-three thousand, three hundred eighty".