54378857 has 8 divisors (see below), whose sum is σ = 60581640. Its totient is φ = 48464640.

The previous prime is 54378823. The next prime is 54378871. The reversal of 54378857 is 75887345.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4096576 + 50282281 = 2024^2 + 7091^2 .

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 54378857 - 2¹⁶ = 54313321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54377857) 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, 71744 + ... + 72497.

It is an arithmetic number, because the mean of its divisors is an integer number (7572705).

Almost surely, 2^54378857 is an apocalyptic number.

It is an amenable number.

54378857 is a deficient number, since it is larger than the sum of its proper divisors (6202783).

54378857 is a wasteful number, since it uses less digits than its factorization.

54378857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144283.

The product of its digits is 940800, while the sum is 47.

The square root of 54378857 is about 7374.2021263320. The cubic root of 54378857 is about 378.8582000518.

The spelling of 54378857 in words is "fifty-four million, three hundred seventy-eight thousand, eight hundred fifty-seven".