4378891536 has 40 divisors (see below), whose sum is σ = 12569041760. Its totient is φ = 1459630368.

The previous prime is 4378891523. The next prime is 4378891549. The reversal of 4378891536 is 6351988734.

It is an interprime number because it is at equal distance from previous prime (4378891523) and next prime (4378891549).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5067730 + ... + 5068593.

It is an arithmetic number, because the mean of its divisors is an integer number (314226044).

Almost surely, 2^4378891536 is an apocalyptic number.

It is an amenable number.

4378891536 is an abundant number, since it is smaller than the sum of its proper divisors (8190150224).

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

4378891536 is a wasteful number, since it uses less digits than its factorization.

4378891536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10136340 (or 10136328 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 4378891536 is about 66173.1934849755. The cubic root of 4378891536 is about 1636.0179436621.

The spelling of 4378891536 in words is "four billion, three hundred seventy-eight million, eight hundred ninety-one thousand, five hundred thirty-six".