647404000 has 192 divisors, whose sum is σ = 1720922112. Its totient is φ = 238656000.

The previous prime is 647403997. The next prime is 647404003. The reversal of 647404000 is 404746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (647403997) and next prime (647404003).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647404003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2851887 + ... + 2852113.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^647404000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860461056).

647404000 is an abundant number, since it is smaller than the sum of its proper divisors (1073518112).

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

647404000 is a wasteful number, since it uses less digits than its factorization.

647404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 647404000 is about 25444.1348840946. The cubic root of 647404000 is about 865.0843581065.

Adding to 647404000 its reverse (404746), we get a palindrome (647808746).

The spelling of 647404000 in words is "six hundred forty-seven million, four hundred four thousand".