54351990 has 288 divisors, whose sum is σ = 191213568. Its totient is φ = 10454400.

The previous prime is 54351971. The next prime is 54352049. The reversal of 54351990 is 9915345.

54351990 is a `hidden beast` number, since 54 + 3 + 519 + 90 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1753275 + ... + 1753305.

It is an arithmetic number, because the mean of its divisors is an integer number (663936).

Almost surely, 2^54351990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54351990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95606784).

54351990 is an abundant number, since it is smaller than the sum of its proper divisors (136861578).

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

54351990 is a wasteful number, since it uses less digits than its factorization.

54351990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 54351990 is about 7372.3802126586. The cubic root of 54351990 is about 378.7957955278.

The spelling of 54351990 in words is "fifty-four million, three hundred fifty-one thousand, nine hundred ninety".