4639680 has 140 divisors (see below), whose sum is σ = 16596360. Its totient is φ = 1230336.

The previous prime is 4639651. The next prime is 4639693. The reversal of 4639680 is 869364.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25831 + ... + 26009.

Almost surely, 2^4639680 is an apocalyptic number.

4639680 is a gapful number since it is divisible by the number (40) 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 4639680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8298180).

4639680 is an abundant number, since it is smaller than the sum of its proper divisors (11956680).

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

4639680 is a wasteful number, since it uses less digits than its factorization.

4639680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 4639680 is about 2153.9916434378. The cubic root of 4639680 is about 166.7871839436.

Adding to 4639680 its sum of digits (36), we get a square (4639716 = 2154²).

The spelling of 4639680 in words is "four million, six hundred thirty-nine thousand, six hundred eighty".