47644040 has 32 divisors (see below), whose sum is σ = 111862080. Its totient is φ = 18228672.

The previous prime is 47644019. The next prime is 47644061. The reversal of 47644040 is 4044674.

It is an interprime number because it is at equal distance from previous prime (47644019) and next prime (47644061).

It is a junction number, because it is equal to n+sod(n) for n = 47643994 and 47644012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24974 + ... + 26813.

It is an arithmetic number, because the mean of its divisors is an integer number (3495690).

Almost surely, 2^47644040 is an apocalyptic number.

47644040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47644040 is an abundant number, since it is smaller than the sum of its proper divisors (64218040).

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

47644040 is a wasteful number, since it uses less digits than its factorization.

47644040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51821 (or 51817 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 47644040 is about 6902.4662259224. The cubic root of 47644040 is about 362.5235244345.

The spelling of 47644040 in words is "forty-seven million, six hundred forty-four thousand, forty".