47129638 has 16 divisors (see below), whose sum is σ = 73283760. Its totient is φ = 22713696.

The previous prime is 47129629. The next prime is 47129639. The reversal of 47129638 is 83692174.

It is a super-2 number, since 2×47129638² = 4442405556022088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47129638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47129639) 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, 5145 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (4580235).

Almost surely, 2^47129638 is an apocalyptic number.

47129638 is a deficient number, since it is larger than the sum of its proper divisors (26154122).

47129638 is a wasteful number, since it uses less digits than its factorization.

47129638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991.

The product of its digits is 72576, while the sum is 40.

The square root of 47129638 is about 6865.1029125571. The cubic root of 47129638 is about 361.2141055399.

The spelling of 47129638 in words is "forty-seven million, one hundred twenty-nine thousand, six hundred thirty-eight".