3866453640 has 384 divisors, whose sum is σ = 15778713600. Its totient is φ = 800616960.

The previous prime is 3866453587. The next prime is 3866453651. The reversal of 3866453640 is 463546683.

3866453640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1099485 + ... + 1102995.

It is an arithmetic number, because the mean of its divisors is an integer number (41090400).

Almost surely, 2^3866453640 is an apocalyptic number.

3866453640 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 3866453640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7889356800).

3866453640 is an abundant number, since it is smaller than the sum of its proper divisors (11912259960).

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

3866453640 is a wasteful number, since it uses less digits than its factorization.

3866453640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577 (or 3570 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The square root of 3866453640 is about 62180.8140828021. The cubic root of 3866453640 is about 1569.5347506442.

The spelling of 3866453640 in words is "three billion, eight hundred sixty-six million, four hundred fifty-three thousand, six hundred forty".