47487440 has 160 divisors (see below), whose sum is σ = 148490496. Its totient is φ = 13639680.

The previous prime is 47487439. The next prime is 47487467. The reversal of 47487440 is 4478474.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 47487394 and 47487403.

It is a congruent number.

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, 79784 + ... + 80376.

Almost surely, 2^47487440 is an apocalyptic number.

47487440 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 47487440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74245248).

47487440 is an abundant number, since it is smaller than the sum of its proper divisors (101003056).

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

47487440 is a wasteful number, since it uses less digits than its factorization.

47487440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 47487440 is about 6891.1131176320. The cubic root of 47487440 is about 362.1258986407.

The spelling of 47487440 in words is "forty-seven million, four hundred eighty-seven thousand, four hundred forty".