647642246 has 16 divisors (see below), whose sum is σ = 1039360560. Its totient is φ = 301747680.

The previous prime is 647642243. The next prime is 647642249. The reversal of 647642246 is 642246746.

It is an interprime number because it is at equal distance from previous prime (647642243) and next prime (647642249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647642243) 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, 137381 + ... + 142016.

It is an arithmetic number, because the mean of its divisors is an integer number (64960035).

Almost surely, 2^647642246 is an apocalyptic number.

647642246 is a deficient number, since it is larger than the sum of its proper divisors (391718314).

647642246 is a wasteful number, since it uses less digits than its factorization.

647642246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279479.

The product of its digits is 387072, while the sum is 41.

The square root of 647642246 is about 25448.8162003658. The cubic root of 647642246 is about 865.1904626981.

The spelling of 647642246 in words is "six hundred forty-seven million, six hundred forty-two thousand, two hundred forty-six".