54331440 has 40 divisors (see below), whose sum is σ = 168428208. Its totient is φ = 14488320.

The previous prime is 54331427. The next prime is 54331447. The reversal of 54331440 is 4413345.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 54331440.

It is not an unprimeable number, because it can be changed into a prime (54331447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112951 + ... + 113430.

Almost surely, 2^54331440 is an apocalyptic number.

It is an amenable number.

54331440 is an abundant number, since it is smaller than the sum of its proper divisors (114096768).

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

54331440 is a wasteful number, since it uses less digits than its factorization.

54331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226397 (or 226391 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 54331440 is about 7370.9863654738. The cubic root of 54331440 is about 378.7480497454.

Adding to 54331440 its reverse (4413345), we get a palindrome (58744785).

The spelling of 54331440 in words is "fifty-four million, three hundred thirty-one thousand, four hundred forty".