54136240 has 20 divisors (see below), whose sum is σ = 125866944. Its totient is φ = 21654464.

The previous prime is 54136231. The next prime is 54136241. The reversal of 54136240 is 4263145.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (54136241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338272 + ... + 338431.

Almost surely, 2^54136240 is an apocalyptic number.

It is an amenable number.

54136240 is an abundant number, since it is smaller than the sum of its proper divisors (71730704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54136240 is a wasteful number, since it uses less digits than its factorization.

54136240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676716 (or 676710 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 54136240 is about 7357.7333466225. The cubic root of 54136240 is about 378.2939214294.

Adding to 54136240 its reverse (4263145), we get a palindrome (58399385).

The spelling of 54136240 in words is "fifty-four million, one hundred thirty-six thousand, two hundred forty".