47388816 has 30 divisors (see below), whose sum is σ = 132623270. Its totient is φ = 15796224.

The previous prime is 47388811. The next prime is 47388829. The reversal of 47388816 is 61888374.

It can be written as a sum of positive squares in only one way, i.e., 34857216 + 12531600 = 5904^2 + 3540^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47388811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164401 + ... + 164688.

Almost surely, 2^47388816 is an apocalyptic number.

It is an amenable number.

47388816 is an abundant number, since it is smaller than the sum of its proper divisors (85234454).

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

47388816 is a wasteful number, since it uses less digits than its factorization.

47388816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329103 (or 329094 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 47388816 is about 6883.9535152411. The cubic root of 47388816 is about 361.8750319024.

The spelling of 47388816 in words is "forty-seven million, three hundred eighty-eight thousand, eight hundred sixteen".