3945730 has 24 divisors (see below), whose sum is σ = 7502652. Its totient is φ = 1493856.

The previous prime is 3945727. The next prime is 3945731. The reversal of 3945730 is 375493.

It can be written as a sum of positive squares in 2 ways, for example, as 3682561 + 263169 = 1919^2 + 513^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3945692 and 3945701.

It is not an unprimeable number, because it can be changed into a prime (3945731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3064 + ... + 4156.

Almost surely, 2^3945730 is an apocalyptic number.

3945730 is a deficient number, since it is larger than the sum of its proper divisors (3556922).

3945730 is a wasteful number, since it uses less digits than its factorization.

3945730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 3945730 is about 1986.3861658801. The cubic root of 3945730 is about 158.0189316630.

The spelling of 3945730 in words is "three million, nine hundred forty-five thousand, seven hundred thirty".