55740393 has 20 divisors (see below), whose sum is σ = 84279888. Its totient is φ = 36708120.

The previous prime is 55740379. The next prime is 55740401. The reversal of 55740393 is 39304755.

It is not a de Polignac number, because 55740393 - 2⁹ = 55739881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55740343) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2578 + ... + 10868.

Almost surely, 2^55740393 is an apocalyptic number.

It is an amenable number.

55740393 is a deficient number, since it is larger than the sum of its proper divisors (28539495).

55740393 is an equidigital number, since it uses as much as digits as its factorization.

55740393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8377 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 55740393 is about 7465.9489015128. The cubic root of 55740393 is about 381.9941178521.

The spelling of 55740393 in words is "fifty-five million, seven hundred forty thousand, three hundred ninety-three".