49278565 has 24 divisors (see below), whose sum is σ = 69205752. Its totient is φ = 33586560.

The previous prime is 49278553. The next prime is 49278587. The reversal of 49278565 is 56587294.

It can be written as a sum of positive squares in 4 ways, for example, as 19695844 + 29582721 = 4438^2 + 5439^2 .

It is not a de Polignac number, because 49278565 - 2¹¹ = 49276517 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47755 + ... + 48775.

It is an arithmetic number, because the mean of its divisors is an integer number (2883573).

Almost surely, 2^49278565 is an apocalyptic number.

It is an amenable number.

49278565 is a deficient number, since it is larger than the sum of its proper divisors (19927187).

49278565 is a wasteful number, since it uses less digits than its factorization.

49278565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1230 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 49278565 is about 7019.8693007776. The cubic root of 49278565 is about 366.6226995031.

The spelling of 49278565 in words is "forty-nine million, two hundred seventy-eight thousand, five hundred sixty-five".