47931408 has 90 divisors (see below), whose sum is σ = 156064974. Its totient is φ = 13692672.

The previous prime is 47931371. The next prime is 47931409. The reversal of 47931408 is 80413974.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31674384 + 16257024 = 5628^2 + 4032^2 .

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

It is not an unprimeable number, because it can be changed into a prime (47931409) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3660 + ... + 10452.

Almost surely, 2^47931408 is an apocalyptic number.

47931408 is a gapful number since it is divisible by the number (48) 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 47931408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78032487).

47931408 is an abundant number, since it is smaller than the sum of its proper divisors (108133566).

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

47931408 is a wasteful number, since it uses less digits than its factorization.

47931408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821 (or 6805 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 47931408 is about 6923.2512593434. The cubic root of 47931408 is about 363.2509250205.

The spelling of 47931408 in words is "forty-seven million, nine hundred thirty-one thousand, four hundred eight".