3969900 has 108 divisors (see below), whose sum is σ = 13608504. Its totient is φ = 960000.

The previous prime is 3969899. The next prime is 3969923. The reversal of 3969900 is 99693.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9700 + ... + 10100.

Almost surely, 2^3969900 is an apocalyptic number.

3969900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3969900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6804252).

3969900 is an abundant number, since it is smaller than the sum of its proper divisors (9638604).

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

3969900 is a wasteful number, since it uses less digits than its factorization.

3969900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 3969900 is about 1992.4607900784. The cubic root of 3969900 is about 158.3409291524.

It can be divided in two parts, 3969 and 900, that multiplied together give a square (3572100 = 1890²).

The spelling of 3969900 in words is "three million, nine hundred sixty-nine thousand, nine hundred".