47640957 has 32 divisors (see below), whose sum is σ = 78946560. Its totient is φ = 24883200.

The previous prime is 47640949. The next prime is 47640977. The reversal of 47640957 is 75904674.

It is not a de Polignac number, because 47640957 - 2³ = 47640949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47640977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28957 + ... + 30557.

It is an arithmetic number, because the mean of its divisors is an integer number (2467080).

Almost surely, 2^47640957 is an apocalyptic number.

It is an amenable number.

47640957 is a deficient number, since it is larger than the sum of its proper divisors (31305603).

47640957 is a wasteful number, since it uses less digits than its factorization.

47640957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 47640957 is about 6902.2428963345. The cubic root of 47640957 is about 362.5157047496.

The spelling of 47640957 in words is "forty-seven million, six hundred forty thousand, nine hundred fifty-seven".