445428138 has 8 divisors (see below), whose sum is σ = 890856288. Its totient is φ = 148476044.

The previous prime is 445428131. The next prime is 445428167. The reversal of 445428138 is 831824544.

It is a sphenic number, since it is the product of 3 distinct primes.

445428138 is an admirable number.

It is a super-2 number, since 2×445428138² = 396812452244294088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445428096 and 445428105.

It is not an unprimeable number, because it can be changed into a prime (445428131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37119006 + ... + 37119017.

It is an arithmetic number, because the mean of its divisors is an integer number (111357036).

Almost surely, 2^445428138 is an apocalyptic number.

445428138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

445428138 is a wasteful number, since it uses less digits than its factorization.

445428138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74238028.

The product of its digits is 122880, while the sum is 39.

The square root of 445428138 is about 21105.1685138973. The cubic root of 445428138 is about 763.7054375083.

The spelling of 445428138 in words is "four hundred forty-five million, four hundred twenty-eight thousand, one hundred thirty-eight".