3152640 has 72 divisors (see below), whose sum is σ = 10081008. Its totient is φ = 839680.

The previous prime is 3152627. The next prime is 3152641. The reversal of 3152640 is 462513.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3152641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3430 + ... + 4250.

It is an arithmetic number, because the mean of its divisors is an integer number (140014).

Almost surely, 2^3152640 is an apocalyptic number.

3152640 is a gapful number since it is divisible by the number (30) 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 3152640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5040504).

3152640 is an abundant number, since it is smaller than the sum of its proper divisors (6928368).

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

3152640 is an equidigital number, since it uses as much as digits as its factorization.

3152640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3152640 is about 1775.5675149090. The cubic root of 3152640 is about 146.6306615016.

The spelling of 3152640 in words is "three million, one hundred fifty-two thousand, six hundred forty".