47139336 has 48 divisors (see below), whose sum is σ = 129774060. Its totient is φ = 15454080.

The previous prime is 47139277. The next prime is 47139341. The reversal of 47139336 is 63393174.

It can be written as a sum of positive squares in 2 ways, for example, as 34222500 + 12916836 = 5850^2 + 3594^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 47139336.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975 + ... + 9758.

Almost surely, 2^47139336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47139336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64887030).

47139336 is an abundant number, since it is smaller than the sum of its proper divisors (82634724).

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

47139336 is a wasteful number, since it uses less digits than its factorization.

47139336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806 (or 10799 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 47139336 is about 6865.8092021261. The cubic root of 47139336 is about 361.2388798595.

The spelling of 47139336 in words is "forty-seven million, one hundred thirty-nine thousand, three hundred thirty-six".