3949400 has 144 divisors (see below), whose sum is σ = 11874240. Its totient is φ = 1209600.

The previous prime is 3949391. The next prime is 3949409. The reversal of 3949400 is 49493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3949391) and next prime (3949409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949409) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 127385 + ... + 127415.

It is an arithmetic number, because the mean of its divisors is an integer number (82460).

Almost surely, 2^3949400 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 3949400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5937120).

3949400 is an abundant number, since it is smaller than the sum of its proper divisors (7924840).

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

3949400 is a wasteful number, since it uses less digits than its factorization.

3949400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 3949400 is about 1987.3097393210. The cubic root of 3949400 is about 158.0679086391.

The spelling of 3949400 in words is "three million, nine hundred forty-nine thousand, four hundred".