647027040 has 384 divisors, whose sum is σ = 2368880640. Its totient is φ = 146995200.

The previous prime is 647027011. The next prime is 647027131. The reversal of 647027040 is 40720746.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 647026989 and 647027007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9657087 + ... + 9657153.

It is an arithmetic number, because the mean of its divisors is an integer number (6168960).

Almost surely, 2^647027040 is an apocalyptic number.

647027040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647027040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184440320).

647027040 is an abundant number, since it is smaller than the sum of its proper divisors (1721853600).

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

647027040 is a wasteful number, since it uses less digits than its factorization.

647027040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 647027040 is about 25436.7262044470. The cubic root of 647027040 is about 864.9164230342.

Adding to 647027040 its reverse (40720746), we get a palindrome (687747786).

The spelling of 647027040 in words is "six hundred forty-seven million, twenty-seven thousand, forty".