47791998 has 64 divisors (see below), whose sum is σ = 114048000. Its totient is φ = 14781312.

The previous prime is 47791967. The next prime is 47792027. The reversal of 47791998 is 89919774.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72193 + ... + 72851.

It is an arithmetic number, because the mean of its divisors is an integer number (1782000).

Almost surely, 2^47791998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47791998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57024000).

47791998 is an abundant number, since it is smaller than the sum of its proper divisors (66256002).

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

47791998 is a wasteful number, since it uses less digits than its factorization.

47791998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 760 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 47791998 is about 6913.1756812626. The cubic root of 47791998 is about 362.8984074692.

The spelling of 47791998 in words is "forty-seven million, seven hundred ninety-one thousand, nine hundred ninety-eight".