3129730 has 16 divisors (see below), whose sum is σ = 5754240. Its totient is φ = 1225072.

The previous prime is 3129701. The next prime is 3129733. The reversal of 3129730 is 379213.

It is a junction number, because it is equal to n+sod(n) for n = 3129695 and 3129704.

It is not an unprimeable number, because it can be changed into a prime (3129733) 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, 2860 + ... + 3799.

It is an arithmetic number, because the mean of its divisors is an integer number (359640).

Almost surely, 2^3129730 is an apocalyptic number.

3129730 is a deficient number, since it is larger than the sum of its proper divisors (2624510).

3129730 is a wasteful number, since it uses less digits than its factorization.

3129730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3129730 is about 1769.1042931382. The cubic root of 3129730 is about 146.2746129467.

The spelling of 3129730 in words is "three million, one hundred twenty-nine thousand, seven hundred thirty".