139743450 has 288 divisors, whose sum is σ = 485147520. Its totient is φ = 27993600.

The previous prime is 139743379. The next prime is 139743481. The reversal of 139743450 is 54347931.

139743450 is a `hidden beast` number, since 139 + 74 + 3 + 450 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1281996 + ... + 1282104.

It is an arithmetic number, because the mean of its divisors is an integer number (1684540).

Almost surely, 2^139743450 is an apocalyptic number.

139743450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139743450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242573760).

139743450 is an abundant number, since it is smaller than the sum of its proper divisors (345404070).

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

139743450 is a wasteful number, since it uses less digits than its factorization.

139743450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 139743450 is about 11821.3133788086. The cubic root of 139743450 is about 518.9320413986.

It can be divided in two parts, 13974 and 3450, that added together give a square (17424 = 132²).

The spelling of 139743450 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, four hundred fifty".