139744449 has 48 divisors (see below), whose sum is σ = 235144000. Its totient is φ = 79221888.

The previous prime is 139744439. The next prime is 139744483. The reversal of 139744449 is 944447931.

139744449 is a `hidden beast` number, since 139 + 74 + 4 + 449 = 666.

It is not a de Polignac number, because 139744449 - 2⁴ = 139744433 is a prime.

It is a super-2 number, since 2×139744449² = 39057022052627202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139744439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81402 + ... + 83100.

Almost surely, 2^139744449 is an apocalyptic number.

139744449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139744449 is a deficient number, since it is larger than the sum of its proper divisors (95399551).

139744449 is a wasteful number, since it uses less digits than its factorization.

139744449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1771 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 139744449 is about 11821.3556329213. The cubic root of 139744449 is about 518.9332779786.

The spelling of 139744449 in words is "one hundred thirty-nine million, seven hundred forty-four thousand, four hundred forty-nine".