4640720 has 40 divisors (see below), whose sum is σ = 12332544. Its totient is φ = 1590912.

The previous prime is 4640719. The next prime is 4640723. The reversal of 4640720 is 270464.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3584 + ... + 4703.

Almost surely, 2^4640720 is an apocalyptic number.

4640720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4640720 is an abundant number, since it is smaller than the sum of its proper divisors (7691824).

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

4640720 is a wasteful number, since it uses less digits than its factorization.

4640720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307 (or 8301 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 4640720 is about 2154.2330421753. The cubic root of 4640720 is about 166.7996449835.

The spelling of 4640720 in words is "four million, six hundred forty thousand, seven hundred twenty".