47728155 has 8 divisors (see below), whose sum is σ = 76365072. Its totient is φ = 25455008.

The previous prime is 47728103. The next prime is 47728159. The reversal of 47728155 is 55182774.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47728155 - 2⁸ = 47727899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47728159) 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, 1590924 + ... + 1590953.

It is an arithmetic number, because the mean of its divisors is an integer number (9545634).

Almost surely, 2^47728155 is an apocalyptic number.

47728155 is a deficient number, since it is larger than the sum of its proper divisors (28636917).

47728155 is a wasteful number, since it uses less digits than its factorization.

47728155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181885.

The product of its digits is 78400, while the sum is 39.

The square root of 47728155 is about 6908.5566509945. The cubic root of 47728155 is about 362.7367426981.

The spelling of 47728155 in words is "forty-seven million, seven hundred twenty-eight thousand, one hundred fifty-five".