49278369 has 24 divisors (see below), whose sum is σ = 76775808. Its totient is φ = 28032480.

The previous prime is 49278353. The next prime is 49278371. The reversal of 49278369 is 96387294.

It is not a de Polignac number, because 49278369 - 2⁴ = 49278353 is a prime.

It is a super-2 number, since 2×49278369² = 4856715302600322, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49278319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39219 + ... + 40455.

It is an arithmetic number, because the mean of its divisors is an integer number (3198992).

Almost surely, 2^49278369 is an apocalyptic number.

49278369 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

49278369 is a deficient number, since it is larger than the sum of its proper divisors (27497439).

49278369 is a wasteful number, since it uses less digits than its factorization.

49278369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1518 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 49278369 is about 7019.8553403899. The cubic root of 49278369 is about 366.6222134355.

The spelling of 49278369 in words is "forty-nine million, two hundred seventy-eight thousand, three hundred sixty-nine".