646142244 has 24 divisors (see below), whose sum is σ = 1644726048. Its totient is φ = 195800640.

The previous prime is 646142227. The next prime is 646142257. The reversal of 646142244 is 442241646.

It is a Harshad number since it is a multiple of its sum of digits (33).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2447377 + ... + 2447640.

It is an arithmetic number, because the mean of its divisors is an integer number (68530252).

Almost surely, 2^646142244 is an apocalyptic number.

It is an amenable number.

646142244 is an abundant number, since it is smaller than the sum of its proper divisors (998583804).

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

646142244 is a wasteful number, since it uses less digits than its factorization.

646142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895035 (or 4895033 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

The square root of 646142244 is about 25419.3281579195. The cubic root of 646142244 is about 864.5219914562.

The spelling of 646142244 in words is "six hundred forty-six million, one hundred forty-two thousand, two hundred forty-four".