4655640 has 64 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 1128320.

The previous prime is 4655617. The next prime is 4655657. The reversal of 4655640 is 465564.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4655598 and 4655607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (238140).

Almost surely, 2^4655640 is an apocalyptic number.

4655640 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 4655640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7620480).

4655640 is an abundant number, since it is smaller than the sum of its proper divisors (10585320).

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

4655640 is a wasteful number, since it uses less digits than its factorization.

4655640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552 (or 3548 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 4655640 is about 2157.6932126695. The cubic root of 4655640 is about 166.9782083988.

It can be divided in two parts, 465 and 5640, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 4655640 in words is "four million, six hundred fifty-five thousand, six hundred forty".