47388929 has 12 divisors (see below), whose sum is σ = 57028500. Its totient is φ = 39217248.

The previous prime is 47388919. The next prime is 47388931. The reversal of 47388929 is 92988374.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37945600 + 9443329 = 6160^2 + 3073^2 .

It is a de Polignac number, because none of the positive numbers 2^k-47388929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47388919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15254 + ... + 18095.

It is an arithmetic number, because the mean of its divisors is an integer number (4752375).

Almost surely, 2^47388929 is an apocalyptic number.

47388929 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

47388929 is a deficient number, since it is larger than the sum of its proper divisors (9639571).

47388929 is a wasteful number, since it uses less digits than its factorization.

47388929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33392 (or 33385 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The square root of 47388929 is about 6883.9617227291. The cubic root of 47388929 is about 361.8753195360.

The spelling of 47388929 in words is "forty-seven million, three hundred eighty-eight thousand, nine hundred twenty-nine".