47644340 has 12 divisors (see below), whose sum is σ = 100053156. Its totient is φ = 19057728.

The previous prime is 47644327. The next prime is 47644351. The reversal of 47644340 is 4344674.

It can be written as a sum of positive squares in 2 ways, for example, as 10214416 + 37429924 = 3196^2 + 6118^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 47644297 and 47644306.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1191089 + ... + 1191128.

It is an arithmetic number, because the mean of its divisors is an integer number (8337763).

Almost surely, 2^47644340 is an apocalyptic number.

It is an amenable number.

47644340 is an abundant number, since it is smaller than the sum of its proper divisors (52408816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47644340 is a wasteful number, since it uses less digits than its factorization.

47644340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382226 (or 2382224 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 47644340 is about 6902.4879572514. The cubic root of 47644340 is about 362.5242853330.

The spelling of 47644340 in words is "forty-seven million, six hundred forty-four thousand, three hundred forty".