47644440 has 32 divisors (see below), whose sum is σ = 142933680. Its totient is φ = 12705152.

The previous prime is 47644439. The next prime is 47644463. The reversal of 47644440 is 4444674.

It is a congruent number.

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, 198399 + ... + 198638.

Almost surely, 2^47644440 is an apocalyptic number.

47644440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47644440 is an abundant number, since it is smaller than the sum of its proper divisors (95289240).

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

47644440 is a wasteful number, since it uses less digits than its factorization.

47644440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397051 (or 397047 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 33.

The square root of 47644440 is about 6902.4952010125. The cubic root of 47644440 is about 362.5245389651.

It can be divided in two parts, 47644 and 440, that added together give a palindrome (48084).

The spelling of 47644440 in words is "forty-seven million, six hundred forty-four thousand, four hundred forty".