647874690 has 32 divisors (see below), whose sum is σ = 1557199296. Its totient is φ = 172511040.

The previous prime is 647874683. The next prime is 647874697. The reversal of 647874690 is 96478746.

It is an interprime number because it is at equal distance from previous prime (647874683) and next prime (647874697).

It is a super-2 number, since 2×647874690² = 839483227885192200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647874697) 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, 5104 + ... + 36356.

It is an arithmetic number, because the mean of its divisors is an integer number (48662478).

Almost surely, 2^647874690 is an apocalyptic number.

647874690 is an abundant number, since it is smaller than the sum of its proper divisors (909324606).

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

647874690 is a wasteful number, since it uses less digits than its factorization.

647874690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31954.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 647874690 is about 25453.3826828577. The cubic root of 647874690 is about 865.2939582509.

The spelling of 647874690 in words is "six hundred forty-seven million, eight hundred seventy-four thousand, six hundred ninety".