47509644 has 96 divisors (see below), whose sum is σ = 137858560. Its totient is φ = 12400128.

The previous prime is 47509619. The next prime is 47509661. The reversal of 47509644 is 44690574.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151632 + ... + 151944.

Almost surely, 2^47509644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47509644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68929280).

47509644 is an abundant number, since it is smaller than the sum of its proper divisors (90348916).

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

47509644 is a wasteful number, since it uses less digits than its factorization.

47509644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 47509644 is about 6892.7239898316. The cubic root of 47509644 is about 362.1823303383.

The spelling of 47509644 in words is "forty-seven million, five hundred nine thousand, six hundred forty-four".