47647440 has 280 divisors, whose sum is σ = 178902240. Its totient is φ = 11757312.

The previous prime is 47647429. The next prime is 47647463. The reversal of 47647440 is 4474674.

47647440 is a `hidden beast` number, since 4 + 7 + 647 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47647395 and 47647404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1108059 + ... + 1108101.

Almost surely, 2^47647440 is an apocalyptic number.

47647440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47647440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89451120).

47647440 is an abundant number, since it is smaller than the sum of its proper divisors (131254800).

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

47647440 is a wasteful number, since it uses less digits than its factorization.

47647440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The square root of 47647440 is about 6902.7125103107. The cubic root of 47647440 is about 362.5321477633.

The spelling of 47647440 in words is "forty-seven million, six hundred forty-seven thousand, four hundred forty".