5249439784 has 8 divisors (see below), whose sum is σ = 9842699610. Its totient is φ = 2624719888.

The previous prime is 5249439733. The next prime is 5249439791. The reversal of 5249439784 is 4879349425.

It can be written as a sum of positive squares in only one way, i.e., 5182560100 + 66879684 = 71990^2 + 8178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328089979 + ... + 328089994.

Almost surely, 2^5249439784 is an apocalyptic number.

It is an amenable number.

5249439784 is a deficient number, since it is larger than the sum of its proper divisors (4593259826).

5249439784 is a wasteful number, since it uses less digits than its factorization.

5249439784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656179979 (or 656179975 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The square root of 5249439784 is about 72453.0177701385. The cubic root of 5249439784 is about 1737.9515003794.

The spelling of 5249439784 in words is "five billion, two hundred forty-nine million, four hundred thirty-nine thousand, seven hundred eighty-four".