47381920 has 24 divisors (see below), whose sum is σ = 111940164. Its totient is φ = 18952704.

The previous prime is 47381899. The next prime is 47381923. The reversal of 47381920 is 2918374.

It can be written as a sum of positive squares in 2 ways, for example, as 45319824 + 2062096 = 6732^2 + 1436^2 .

It is not an unprimeable number, because it can be changed into a prime (47381923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147909 + ... + 148228.

Almost surely, 2^47381920 is an apocalyptic number.

47381920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47381920 is an abundant number, since it is smaller than the sum of its proper divisors (64558244).

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

47381920 is a wasteful number, since it uses less digits than its factorization.

47381920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296152 (or 296144 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 47381920 is about 6883.4526220495. The cubic root of 47381920 is about 361.8574777515.

The spelling of 47381920 in words is "forty-seven million, three hundred eighty-one thousand, nine hundred twenty".