54459990 has 96 divisors (see below), whose sum is σ = 154496160. Its totient is φ = 13229568.

The previous prime is 54459961. The next prime is 54460019. The reversal of 54459990 is 9995445.

54459990 is a `hidden beast` number, since 54 + 4 + 599 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (54459961) and next prime (54460019).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103869 + ... + 104391.

It is an arithmetic number, because the mean of its divisors is an integer number (1609335).

Almost surely, 2^54459990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54459990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77248080).

54459990 is an abundant number, since it is smaller than the sum of its proper divisors (100036170).

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

54459990 is a wasteful number, since it uses less digits than its factorization.

54459990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 54459990 is about 7379.7012134639. The cubic root of 54459990 is about 379.0465246432.

The spelling of 54459990 in words is "fifty-four million, four hundred fifty-nine thousand, nine hundred ninety".