647770376 has 16 divisors (see below), whose sum is σ = 1324985040. Its totient is φ = 294441040.

The previous prime is 647770373. The next prime is 647770427. The reversal of 647770376 is 673077746.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 647770376.

It is not an unprimeable number, because it can be changed into a prime (647770373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3680426 + ... + 3680601.

It is an arithmetic number, because the mean of its divisors is an integer number (82811565).

Almost surely, 2^647770376 is an apocalyptic number.

It is an amenable number.

647770376 is an abundant number, since it is smaller than the sum of its proper divisors (677214664).

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

647770376 is a wasteful number, since it uses less digits than its factorization.

647770376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7361044 (or 7361040 counting only the distinct ones).

The product of its (nonzero) digits is 1037232, while the sum is 47.

The square root of 647770376 is about 25451.3334817648. Note that the first 3 decimals coincide. The cubic root of 647770376 is about 865.2475155668.

The spelling of 647770376 in words is "six hundred forty-seven million, seven hundred seventy thousand, three hundred seventy-six".