3145749520 has 40 divisors (see below), whose sum is σ = 7317299520. Its totient is φ = 1257709440.

The previous prime is 3145749511. The next prime is 3145749553. The reversal of 3145749520 is 259475413.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188725 + ... + 204715.

It is an arithmetic number, because the mean of its divisors is an integer number (182932488).

Almost surely, 2^3145749520 is an apocalyptic number.

It is an amenable number.

3145749520 is an abundant number, since it is smaller than the sum of its proper divisors (4171550000).

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

3145749520 is a wasteful number, since it uses less digits than its factorization.

3145749520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18463 (or 18457 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 3145749520 is about 56086.9817337321. The cubic root of 3145749520 is about 1465.2375716947.

The spelling of 3145749520 in words is "three billion, one hundred forty-five million, seven hundred forty-nine thousand, five hundred twenty".