3487021385 has 16 divisors (see below), whose sum is σ = 4503207312. Its totient is φ = 2582476800.

The previous prime is 3487021301. The next prime is 3487021387. The reversal of 3487021385 is 5831207843.

It can be written as a sum of positive squares in 8 ways, for example, as 82065481 + 3404955904 = 9059^2 + 58352^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3487021385 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3487021387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331076 + ... + 341445.

It is an arithmetic number, because the mean of its divisors is an integer number (281450457).

Almost surely, 2^3487021385 is an apocalyptic number.

It is an amenable number.

3487021385 is a deficient number, since it is larger than the sum of its proper divisors (1016185927).

3487021385 is a wasteful number, since it uses less digits than its factorization.

3487021385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672604.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 3487021385 is about 59051.0066383292. The cubic root of 3487021385 is about 1516.4154605216.

The spelling of 3487021385 in words is "three billion, four hundred eighty-seven million, twenty-one thousand, three hundred eighty-five".