648858872 has 32 divisors (see below), whose sum is σ = 1242172800. Its totient is φ = 317657184.

The previous prime is 648858871. The next prime is 648858901. The reversal of 648858872 is 278858846.

It is a happy number.

It is a super-2 number, since 2×648858872² = 842035671546224768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648858871) 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, 121523 + ... + 126749.

It is an arithmetic number, because the mean of its divisors is an integer number (38817900).

Almost surely, 2^648858872 is an apocalyptic number.

It is an amenable number.

648858872 is a deficient number, since it is larger than the sum of its proper divisors (593313928).

648858872 is a wasteful number, since it uses less digits than its factorization.

648858872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555 (or 5551 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 56.

The square root of 648858872 is about 25472.7083758284. The cubic root of 648858872 is about 865.7318906123.

The spelling of 648858872 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, eight hundred seventy-two".