4394894436 has 135 divisors (see below), whose sum is σ = 11993390409. Its totient is φ = 1403311392.

The previous prime is 4394894431. The next prime is 4394894453. The reversal of 4394894436 is 6344984934.

The square root of 4394894436 is 66294.

It is a perfect power (a square), and thus also a powerful number.

4394894436 is a `hidden beast` number, since 43 + 94 + 89 + 4 + 436 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2304576036 + 2090318400 = 48006^2 + 45720^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (4394894431) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 34605405 + ... + 34605531.

Almost surely, 2^4394894436 is an apocalyptic number.

4394894436 is the 66294-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4394894436

4394894436 is an abundant number, since it is smaller than the sum of its proper divisors (7598495973).

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

4394894436 is a wasteful number, since it uses less digits than its factorization.

4394894436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 161 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The cubic root of 4394894436 is about 1638.0084932941.

It can be divided in two parts, 43948 and 94436, that added together give a square (138384 = 372²).

The spelling of 4394894436 in words is "four billion, three hundred ninety-four million, eight hundred ninety-four thousand, four hundred thirty-six".