647719428 has 48 divisors (see below), whose sum is σ = 1527122240. Its totient is φ = 213663744.

The previous prime is 647719427. The next prime is 647719433. The reversal of 647719428 is 824917746.

It is not an unprimeable number, because it can be changed into a prime (647719427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962100 + ... + 962772.

Almost surely, 2^647719428 is an apocalyptic number.

It is an amenable number.

647719428 is an abundant number, since it is smaller than the sum of its proper divisors (879402812).

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

647719428 is a wasteful number, since it uses less digits than its factorization.

647719428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1394 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 647719428 is about 25450.3325715009. The cubic root of 647719428 is about 865.2248306835.

The spelling of 647719428 in words is "six hundred forty-seven million, seven hundred nineteen thousand, four hundred twenty-eight".