648159438 has 16 divisors (see below), whose sum is σ = 1296852480. Its totient is φ = 215964216.

The previous prime is 648159437. The next prime is 648159503. The reversal of 648159438 is 834951846.

It is a super-2 number, since 2×648159438² = 840221314136951688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648159437) 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, 5470 + ... + 36417.

It is an arithmetic number, because the mean of its divisors is an integer number (81053280).

Almost surely, 2^648159438 is an apocalyptic number.

648159438 is an abundant number, since it is smaller than the sum of its proper divisors (648693042).

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

648159438 is a wasteful number, since it uses less digits than its factorization.

648159438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44471.

The product of its digits is 829440, while the sum is 48.

The square root of 648159438 is about 25458.9755881889. The cubic root of 648159438 is about 865.4207083975.

The spelling of 648159438 in words is "six hundred forty-eight million, one hundred fifty-nine thousand, four hundred thirty-eight".