438278480 has 20 divisors (see below), whose sum is σ = 1018997652. Its totient is φ = 175311360.

The previous prime is 438278471. The next prime is 438278521. The reversal of 438278480 is 84872834.

It can be written as a sum of positive squares in 2 ways, for example, as 244734736 + 193543744 = 15644^2 + 13912^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×438278480² = 384176052062220800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739161 + ... + 2739320.

Almost surely, 2^438278480 is an apocalyptic number.

438278480 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

438278480 is an abundant number, since it is smaller than the sum of its proper divisors (580719172).

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

438278480 is a wasteful number, since it uses less digits than its factorization.

438278480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478494 (or 5478488 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The square root of 438278480 is about 20935.1016238279. The cubic root of 438278480 is about 759.5972473611.

The spelling of 438278480 in words is "four hundred thirty-eight million, two hundred seventy-eight thousand, four hundred eighty".