47491438 has 16 divisors (see below), whose sum is σ = 76340880. Its totient is φ = 22078336.

The previous prime is 47491417. The next prime is 47491439. The reversal of 47491438 is 83419474.

It is a self number, because there is not a number n which added to its sum of digits gives 47491438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47491439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (4771305).

Almost surely, 2^47491438 is an apocalyptic number.

47491438 is a deficient number, since it is larger than the sum of its proper divisors (28849442).

47491438 is a wasteful number, since it uses less digits than its factorization.

47491438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16931.

The product of its digits is 96768, while the sum is 40.

The square root of 47491438 is about 6891.4031952861. The cubic root of 47491438 is about 362.1360608977.

Subtracting 47491438 from its reverse (83419474), we obtain a square (35928036 = 5994²).

The spelling of 47491438 in words is "forty-seven million, four hundred ninety-one thousand, four hundred thirty-eight".