648438070 has 80 divisors (see below), whose sum is σ = 1379436480. Its totient is φ = 219432192.

The previous prime is 648438053. The next prime is 648438073. The reversal of 648438070 is 70834846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648438073) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2713011 + ... + 2713249.

It is an arithmetic number, because the mean of its divisors is an integer number (17242956).

Almost surely, 2^648438070 is an apocalyptic number.

648438070 is an abundant number, since it is smaller than the sum of its proper divisors (730998410).

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

648438070 is a wasteful number, since it uses less digits than its factorization.

648438070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 648438070 is about 25464.4471764066. The cubic root of 648438070 is about 865.5447001933.

The spelling of 648438070 in words is "six hundred forty-eight million, four hundred thirty-eight thousand, seventy".