47640771 has 16 divisors (see below), whose sum is σ = 74294400. Its totient is φ = 30088584.

The previous prime is 47640757. The next prime is 47640773. The reversal of 47640771 is 17704674.

47640771 is a `hidden beast` number, since 4 + 7 + 640 + 7 + 7 + 1 = 666.

It is not a de Polignac number, because 47640771 - 2¹⁷ = 47509699 is a prime.

It is a super-2 number, since 2×47640771² = 4539286122948882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47640773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45921 + ... + 46946.

It is an arithmetic number, because the mean of its divisors is an integer number (4643400).

Almost surely, 2^47640771 is an apocalyptic number.

47640771 is a deficient number, since it is larger than the sum of its proper divisors (26653629).

47640771 is a wasteful number, since it uses less digits than its factorization.

47640771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92895 (or 92889 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 47640771 is about 6902.2294224403. The cubic root of 47640771 is about 362.5152329707.

The spelling of 47640771 in words is "forty-seven million, six hundred forty thousand, seven hundred seventy-one".