3945500 has 48 divisors (see below), whose sum is σ = 9295104. Its totient is φ = 1454400.

The previous prime is 3945467. The next prime is 3945527. The reversal of 3945500 is 55493.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 3945500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6197 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (193648).

Almost surely, 2^3945500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3945500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4647552).

3945500 is an abundant number, since it is smaller than the sum of its proper divisors (5349604).

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

3945500 is a wasteful number, since it uses less digits than its factorization.

3945500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3945500 is about 1986.3282709562. The cubic root of 3945500 is about 158.0158612502.

The spelling of 3945500 in words is "three million, nine hundred forty-five thousand, five hundred".