3145640 has 32 divisors (see below), whose sum is σ = 7452000. Its totient is φ = 1191744.

The previous prime is 3145633. The next prime is 3145661. The reversal of 3145640 is 465413.

It is a happy 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, 1310 + ... + 2829.

It is an arithmetic number, because the mean of its divisors is an integer number (232875).

Almost surely, 2^3145640 is an apocalyptic number.

It is an amenable number.

3145640 is an abundant number, since it is smaller than the sum of its proper divisors (4306360).

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

3145640 is a wasteful number, since it uses less digits than its factorization.

3145640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3145640 is about 1773.5952187577. The cubic root of 3145640 is about 146.5220567302.

The spelling of 3145640 in words is "three million, one hundred forty-five thousand, six hundred forty".