47428557 has 8 divisors (see below), whose sum is σ = 68987040. Its totient is φ = 28744560.

The previous prime is 47428529. The next prime is 47428571. The reversal of 47428557 is 75582474.

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

It is not a de Polignac number, because 47428557 - 2¹⁰ = 47427533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47428457) 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, 718582 + ... + 718647.

It is an arithmetic number, because the mean of its divisors is an integer number (8623380).

Almost surely, 2^47428557 is an apocalyptic number.

It is an amenable number.

47428557 is a deficient number, since it is larger than the sum of its proper divisors (21558483).

47428557 is a wasteful number, since it uses less digits than its factorization.

47428557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437243.

The product of its digits is 313600, while the sum is 42.

The square root of 47428557 is about 6886.8394057071. The cubic root of 47428557 is about 361.9761616528.

The spelling of 47428557 in words is "forty-seven million, four hundred twenty-eight thousand, five hundred fifty-seven".