4036640 has 24 divisors (see below), whose sum is σ = 9536940. Its totient is φ = 1614592.

The previous prime is 4036621. The next prime is 4036649. The reversal of 4036640 is 466304.

It can be written as a sum of positive squares in 2 ways, for example, as 3579664 + 456976 = 1892^2 + 676^2 .

It is not an unprimeable number, because it can be changed into a prime (4036649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12455 + ... + 12774.

Almost surely, 2^4036640 is an apocalyptic number.

4036640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4036640 is an abundant number, since it is smaller than the sum of its proper divisors (5500300).

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

4036640 is a wasteful number, since it uses less digits than its factorization.

4036640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25244 (or 25236 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 4036640 is about 2009.1391191254. The cubic root of 4036640 is about 159.2233192275.

The spelling of 4036640 in words is "four million, thirty-six thousand, six hundred forty".