647460 has 96 divisors (see below), whose sum is σ = 2217600. Its totient is φ = 155520.

The previous prime is 647453. The next prime is 647477. The reversal of 647460 is 64746.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

647460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5886 + ... + 5994.

It is an arithmetic number, because the mean of its divisors is an integer number (23100).

2⁶⁴⁷⁴⁶⁰ is an apocalyptic number.

647460 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 647460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108800).

647460 is an abundant number, since it is smaller than the sum of its proper divisors (1570140).

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

647460 is a wasteful number, since it uses less digits than its factorization.

647460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 647460 is about 804.6489917970. The cubic root of 647460 is about 86.5109300454.

The spelling of 647460 in words is "six hundred forty-seven thousand, four hundred sixty".