446990138 has 16 divisors (see below), whose sum is σ = 769620480. Its totient is φ = 190729296.

The previous prime is 446990113. The next prime is 446990153. The reversal of 446990138 is 831099644.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66506 + ... + 72917.

It is an arithmetic number, because the mean of its divisors is an integer number (48101280).

Almost surely, 2^446990138 is an apocalyptic number.

446990138 is a deficient number, since it is larger than the sum of its proper divisors (322630342).

446990138 is a wasteful number, since it uses less digits than its factorization.

446990138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139661.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 446990138 is about 21142.1412822826. The cubic root of 446990138 is about 764.5971011285.

The spelling of 446990138 in words is "four hundred forty-six million, nine hundred ninety thousand, one hundred thirty-eight".