54155640 has 128 divisors (see below), whose sum is σ = 202590720. Its totient is φ = 11251200.

The previous prime is 54155611. The next prime is 54155653. The reversal of 54155640 is 4655145.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 54155598 and 54155607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6310 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (1582740).

Almost surely, 2^54155640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54155640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101295360).

54155640 is an abundant number, since it is smaller than the sum of its proper divisors (148435080).

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

54155640 is a wasteful number, since it uses less digits than its factorization.

54155640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893 (or 5889 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 54155640 is about 7359.0515693260. The cubic root of 54155640 is about 378.3391038901.

The spelling of 54155640 in words is "fifty-four million, one hundred fifty-five thousand, six hundred forty".