647412140 has 24 divisors (see below), whose sum is σ = 1392727392. Its totient is φ = 252648320.

The previous prime is 647412113. The next prime is 647412179. The reversal of 647412140 is 41214746.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393944 + ... + 395583.

It is an arithmetic number, because the mean of its divisors is an integer number (58030308).

Almost surely, 2^647412140 is an apocalyptic number.

It is an amenable number.

647412140 is an abundant number, since it is smaller than the sum of its proper divisors (745315252).

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

647412140 is a wasteful number, since it uses less digits than its factorization.

647412140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789577 (or 789575 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 647412140 is about 25444.2948418698. The cubic root of 647412140 is about 865.0879837442.

Adding to 647412140 its reverse (41214746), we get a palindrome (688626886).

The spelling of 647412140 in words is "six hundred forty-seven million, four hundred twelve thousand, one hundred forty".