4640040 has 48 divisors (see below), whose sum is σ = 15081300. Its totient is φ = 1237248.

The previous prime is 4640017. The next prime is 4640057. The reversal of 4640040 is 400464.

It can be written as a sum of positive squares in 2 ways, for example, as 4639716 + 324 = 2154^2 + 18^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4639995 and 4640022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6085 + ... + 6804.

Almost surely, 2^4640040 is an apocalyptic number.

4640040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4640040 is an abundant number, since it is smaller than the sum of its proper divisors (10441260).

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

4640040 is a wasteful number, since it uses less digits than its factorization.

4640040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906 (or 12899 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4640040 is about 2154.0752076007. The cubic root of 4640040 is about 166.7914975912.

The spelling of 4640040 in words is "four million, six hundred forty thousand, forty".