448138840 has 32 divisors (see below), whose sum is σ = 1008942480. Its totient is φ = 179143552.

The previous prime is 448138837. The next prime is 448138841. The reversal of 448138840 is 48831844.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 448138793 and 448138802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448138841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96819 + ... + 101341.

Almost surely, 2^448138840 is an apocalyptic number.

448138840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

448138840 is an abundant number, since it is smaller than the sum of its proper divisors (560803640).

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

448138840 is a wasteful number, since it uses less digits than its factorization.

448138840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011 (or 7007 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 448138840 is about 21169.2900211604. The cubic root of 448138840 is about 765.2515099940.

The spelling of 448138840 in words is "four hundred forty-eight million, one hundred thirty-eight thousand, eight hundred forty".