47478790840 has 96 divisors (see below), whose sum is σ = 116362018080. Its totient is φ = 17332153344.

The previous prime is 47478790817. The next prime is 47478790841. The reversal of 47478790840 is 4809787474.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47478790841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4113157 + ... + 4124683.

It is an arithmetic number, because the mean of its divisors is an integer number (1212104355).

Almost surely, 2^47478790840 is an apocalyptic number.

47478790840 is a gapful number since it is divisible by the number (40) 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 47478790840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58181009040).

47478790840 is an abundant number, since it is smaller than the sum of its proper divisors (68883227240).

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

47478790840 is a wasteful number, since it uses less digits than its factorization.

47478790840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729 (or 11636 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 47478790840 in words is "forty-seven billion, four hundred seventy-eight million, seven hundred ninety thousand, eight hundred forty".