3145440 has 48 divisors (see below), whose sum is σ = 9909648. Its totient is φ = 838656.

The previous prime is 3145399. The next prime is 3145447. The reversal of 3145440 is 445413.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145447) 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, 2797 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (206451).

Almost surely, 2^3145440 is an apocalyptic number.

3145440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3145440 is an abundant number, since it is smaller than the sum of its proper divisors (6764208).

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

3145440 is a wasteful number, since it uses less digits than its factorization.

3145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571 (or 6563 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 3145440 is about 1773.5388352106. The cubic root of 3145440 is about 146.5189513703.

The spelling of 3145440 in words is "three million, one hundred forty-five thousand, four hundred forty".