55140468 has 12 divisors (see below), whose sum is σ = 128661120. Its totient is φ = 18380152.

The previous prime is 55140467. The next prime is 55140473. The reversal of 55140468 is 86404155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55140468² = 6080942422518048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55140461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2297508 + ... + 2297531.

It is an arithmetic number, because the mean of its divisors is an integer number (10721760).

Almost surely, 2^55140468 is an apocalyptic number.

It is an amenable number.

55140468 is an abundant number, since it is smaller than the sum of its proper divisors (73520652).

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

55140468 is a wasteful number, since it uses less digits than its factorization.

55140468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595046 (or 4595044 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 55140468 is about 7425.6627987002. The cubic root of 55140468 is about 380.6187242582.

The spelling of 55140468 in words is "fifty-five million, one hundred forty thousand, four hundred sixty-eight".