4016640 has 80 divisors (see below), whose sum is σ = 12865248. Its totient is φ = 1069056.

The previous prime is 4016611. The next prime is 4016671. The reversal of 4016640 is 466104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4016640² = 32266793779200, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7419 + ... + 7941.

Almost surely, 2^4016640 is an apocalyptic number.

4016640 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 4016640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6432624).

4016640 is an abundant number, since it is smaller than the sum of its proper divisors (8848608).

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

4016640 is an equidigital number, since it uses as much as digits as its factorization.

4016640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4016640 is about 2004.1556825756. The cubic root of 4016640 is about 158.9599202803.

It can be divided in two parts, 4016 and 640, that added together give a triangular number (4656 = T₉₆).

The spelling of 4016640 in words is "four million, sixteen thousand, six hundred forty".