53447940 has 216 divisors, whose sum is σ = 201434688. Its totient is φ = 11232000.

The previous prime is 53447909. The next prime is 53447941. The reversal of 53447940 is 4974435.

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 = 53447895 and 53447904.

It is not an unprimeable number, because it can be changed into a prime (53447941) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 212815 + ... + 213065.

It is an arithmetic number, because the mean of its divisors is an integer number (932568).

Almost surely, 2^53447940 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 53447940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100717344).

53447940 is an abundant number, since it is smaller than the sum of its proper divisors (147986748).

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

53447940 is a wasteful number, since it uses less digits than its factorization.

53447940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 53447940 is about 7310.8098046660. The cubic root of 53447940 is about 376.6838411605.

The spelling of 53447940 in words is "fifty-three million, four hundred forty-seven thousand, nine hundred forty".