54378891 has 32 divisors (see below), whose sum is σ = 92736000. Its totient is φ = 30849120.

The previous prime is 54378871. The next prime is 54378959. The reversal of 54378891 is 19887345.

It is not a de Polignac number, because 54378891 - 2¹³ = 54370699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54378871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27196 + ... + 29126.

It is an arithmetic number, because the mean of its divisors is an integer number (2898000).

Almost surely, 2^54378891 is an apocalyptic number.

54378891 is a deficient number, since it is larger than the sum of its proper divisors (38357109).

54378891 is a wasteful number, since it uses less digits than its factorization.

54378891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2090 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 54378891 is about 7374.2044316658. The cubic root of 54378891 is about 378.8582790113.

The spelling of 54378891 in words is "fifty-four million, three hundred seventy-eight thousand, eight hundred ninety-one".