3851478540 has 288 divisors, whose sum is σ = 14580349056. Its totient is φ = 801239040.

The previous prime is 3851478539. The next prime is 3851478557. The reversal of 3851478540 is 458741583.

3851478540 is a `hidden beast` number, since 38 + 5 + 1 + 4 + 78 + 540 = 666.

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, 1194130 + ... + 1197350.

It is an arithmetic number, because the mean of its divisors is an integer number (50626212).

Almost surely, 2^3851478540 is an apocalyptic number.

3851478540 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 3851478540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7290174528).

3851478540 is an abundant number, since it is smaller than the sum of its proper divisors (10728870516).

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

3851478540 is a wasteful number, since it uses less digits than its factorization.

3851478540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 3851478540 is about 62060.2815011340. The cubic root of 3851478540 is about 1567.5058156267.

The spelling of 3851478540 in words is "three billion, eight hundred fifty-one million, four hundred seventy-eight thousand, five hundred forty".