54278409 has 8 divisors (see below), whose sum is σ = 72924192. Its totient is φ = 35909120.

The previous prime is 54278369. The next prime is 54278437. The reversal of 54278409 is 90487245.

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 54278409 - 2¹¹ = 54276361 is a prime.

It is a super-2 number, since 2×54278409² = 5892291367142562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54278449) 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, 68664 + ... + 69449.

It is an arithmetic number, because the mean of its divisors is an integer number (9115524).

Almost surely, 2^54278409 is an apocalyptic number.

It is an amenable number.

54278409 is a deficient number, since it is larger than the sum of its proper divisors (18645783).

54278409 is a wasteful number, since it uses less digits than its factorization.

54278409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138247.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 54278409 is about 7367.3882074993. The cubic root of 54278409 is about 378.6247820987.

The spelling of 54278409 in words is "fifty-four million, two hundred seventy-eight thousand, four hundred nine".