4720644 has 18 divisors (see below), whose sum is σ = 11932830. Its totient is φ = 1573536.

The previous prime is 4720637. The next prime is 4720663. The reversal of 4720644 is 4460274.

It can be written as a sum of positive squares in only one way, i.e., 4460544 + 260100 = 2112^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65529 + ... + 65600.

It is an arithmetic number, because the mean of its divisors is an integer number (662935).

Almost surely, 2^4720644 is an apocalyptic number.

It is an amenable number.

4720644 is an abundant number, since it is smaller than the sum of its proper divisors (7212186).

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

4720644 is a wasteful number, since it uses less digits than its factorization.

4720644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131139 (or 131134 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 4720644 is about 2172.7043056983. The cubic root of 4720644 is about 167.7517592246.

The spelling of 4720644 in words is "four million, seven hundred twenty thousand, six hundred forty-four".