53778417 has 32 divisors (see below), whose sum is σ = 94110720. Its totient is φ = 26464320.

The previous prime is 53778409. The next prime is 53778419. The reversal of 53778417 is 71487735.

It is a happy number.

It is not a de Polignac number, because 53778417 - 2³ = 53778409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53778419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1738 + ... + 10515.

It is an arithmetic number, because the mean of its divisors is an integer number (2940960).

Almost surely, 2^53778417 is an apocalyptic number.

53778417 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

53778417 is a deficient number, since it is larger than the sum of its proper divisors (40332303).

53778417 is a wasteful number, since it uses less digits than its factorization.

53778417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12293.

The product of its digits is 164640, while the sum is 42.

The square root of 53778417 is about 7333.3769165372. The cubic root of 53778417 is about 377.4586116050.

The spelling of 53778417 in words is "fifty-three million, seven hundred seventy-eight thousand, four hundred seventeen".