47393128 has 8 divisors (see below), whose sum is σ = 88862130. Its totient is φ = 23696560.

The previous prime is 47393117. The next prime is 47393131. The reversal of 47393128 is 82139374.

It can be written as a sum of positive squares in only one way, i.e., 34128964 + 13264164 = 5842^2 + 3642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×47393128² = 4492217163248768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2962063 + ... + 2962078.

Almost surely, 2^47393128 is an apocalyptic number.

It is an amenable number.

47393128 is a deficient number, since it is larger than the sum of its proper divisors (41469002).

47393128 is a wasteful number, since it uses less digits than its factorization.

47393128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924147 (or 5924143 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 47393128 is about 6884.2667002376. The cubic root of 47393128 is about 361.8860074725.

The spelling of 47393128 in words is "forty-seven million, three hundred ninety-three thousand, one hundred twenty-eight".