3986447400 has 480 divisors, whose sum is σ = 15577752960. Its totient is φ = 937474560.

The previous prime is 3986447393. The next prime is 3986447407. The reversal of 3986447400 is 47446893.

3986447400 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3986447393) and next prime (3986447407).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986447407) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4843389 + ... + 4844211.

It is an arithmetic number, because the mean of its divisors is an integer number (32453652).

Almost surely, 2^3986447400 is an apocalyptic number.

3986447400 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 3986447400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7788876480).

3986447400 is an abundant number, since it is smaller than the sum of its proper divisors (11591305560).

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

3986447400 is a wasteful number, since it uses less digits than its factorization.

3986447400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 3986447400 is about 63138.3195848607. The cubic root of 3986447400 is about 1585.6062391163.

The spelling of 3986447400 in words is "three billion, nine hundred eighty-six million, four hundred forty-seven thousand, four hundred".