3578640 has 160 divisors (see below), whose sum is σ = 12665856. Its totient is φ = 829440.

The previous prime is 3578633. The next prime is 3578651. The reversal of 3578640 is 468753.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96702 + ... + 96738.

Almost surely, 2^3578640 is an apocalyptic number.

3578640 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 3578640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6332928).

3578640 is an abundant number, since it is smaller than the sum of its proper divisors (9087216).

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

3578640 is a wasteful number, since it uses less digits than its factorization.

3578640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 3578640 is about 1891.7293675365. The cubic root of 3578640 is about 152.9581670415.

The spelling of 3578640 in words is "three million, five hundred seventy-eight thousand, six hundred forty".