47991064 has 64 divisors (see below), whose sum is σ = 103783680. Its totient is φ = 20592000.

The previous prime is 47991061. The next prime is 47991071. The reversal of 47991064 is 46019974.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47991061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265054 + ... + 265234.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 2^47991064 is an apocalyptic number.

47991064 is a gapful number since it is divisible by the number (44) 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 47991064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51891840).

47991064 is an abundant number, since it is smaller than the sum of its proper divisors (55792616).

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

47991064 is a wasteful number, since it uses less digits than its factorization.

47991064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 47991064 is about 6927.5583000073. The cubic root of 47991064 is about 363.4015646812.

It can be divided in two parts, 479910 and 64, that added together give a palindrome (479974).

The spelling of 47991064 in words is "forty-seven million, nine hundred ninety-one thousand, sixty-four".