648169240 has 16 divisors (see below), whose sum is σ = 1458380880. Its totient is φ = 259267680.

The previous prime is 648169237. The next prime is 648169273. The reversal of 648169240 is 42961846.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 16204231 = 648169240 / (6 + 4 + 8 + 1 + 6 + 9 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 648169193 and 648169202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8102076 + ... + 8102155.

It is an arithmetic number, because the mean of its divisors is an integer number (91148805).

Almost surely, 2^648169240 is an apocalyptic number.

It is an amenable number.

648169240 is an abundant number, since it is smaller than the sum of its proper divisors (810211640).

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

648169240 is a wasteful number, since it uses less digits than its factorization.

648169240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204242 (or 16204238 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 648169240 is about 25459.1680932430. The cubic root of 648169240 is about 865.4250709100.

The spelling of 648169240 in words is "six hundred forty-eight million, one hundred sixty-nine thousand, two hundred forty".