54905405 has 8 divisors (see below), whose sum is σ = 66058200. Its totient is φ = 43809856.

The previous prime is 54905401. The next prime is 54905407. The reversal of 54905405 is 50450945.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1044484 + 53860921 = 1022^2 + 7339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54905405 - 2² = 54905401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54905401) 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, 12170 + ... + 16059.

It is an arithmetic number, because the mean of its divisors is an integer number (8257275).

Almost surely, 2^54905405 is an apocalyptic number.

It is an amenable number.

54905405 is a deficient number, since it is larger than the sum of its proper divisors (11152795).

54905405 is a wasteful number, since it uses less digits than its factorization.

54905405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28623.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 54905405 is about 7409.8181489157. The cubic root of 54905405 is about 380.0770965455.

The spelling of 54905405 in words is "fifty-four million, nine hundred five thousand, four hundred five".