53447394 has 96 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 12798720.

The previous prime is 53447393. The next prime is 53447411. The reversal of 53447394 is 49374435.

53447394 = 187² + 188² + ... + 550².

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (53447393) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65662 + ... + 66470.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 2^53447394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53447394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72394560).

53447394 is an abundant number, since it is smaller than the sum of its proper divisors (91341726).

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

53447394 is a wasteful number, since it uses less digits than its factorization.

53447394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 845 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 53447394 is about 7310.7724626061. The cubic root of 53447394 is about 376.6825584788.

The spelling of 53447394 in words is "fifty-three million, four hundred forty-seven thousand, three hundred ninety-four".