139018446 has 48 divisors (see below), whose sum is σ = 355350528. Its totient is φ = 38437200.

The previous prime is 139018403. The next prime is 139018457. The reversal of 139018446 is 644810931.

It is a super-2 number, since 2×139018446² = 38652256656509832, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139018446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13890 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (7403136).

Almost surely, 2^139018446 is an apocalyptic number.

139018446 is an abundant number, since it is smaller than the sum of its proper divisors (216332082).

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

139018446 is a wasteful number, since it uses less digits than its factorization.

139018446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35637 (or 35634 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 139018446 is about 11790.6083812499. The cubic root of 139018446 is about 518.0330599095.

The spelling of 139018446 in words is "one hundred thirty-nine million, eighteen thousand, four hundred forty-six".