646474248 has 288 divisors, whose sum is σ = 2202370560. Its totient is φ = 170311680.

The previous prime is 646474229. The next prime is 646474273. The reversal of 646474248 is 842474646.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2515336 + ... + 2515592.

It is an arithmetic number, because the mean of its divisors is an integer number (7647120).

Almost surely, 2^646474248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646474248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101185280).

646474248 is an abundant number, since it is smaller than the sum of its proper divisors (1555896312).

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

646474248 is a wasteful number, since it uses less digits than its factorization.

646474248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 323 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The square root of 646474248 is about 25425.8578616337. The cubic root of 646474248 is about 864.6700370895.

The spelling of 646474248 in words is "six hundred forty-six million, four hundred seventy-four thousand, two hundred forty-eight".