408067728 has 40 divisors (see below), whose sum is σ = 1116187488. Its totient is φ = 128020992.

The previous prime is 408067727. The next prime is 408067799. The reversal of 408067728 is 827760804.

It is a self number, because there is not a number n which added to its sum of digits gives 408067728.

It is not an unprimeable number, because it can be changed into a prime (408067727) 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, 249226 + ... + 250857.

Almost surely, 2^408067728 is an apocalyptic number.

408067728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

408067728 is an abundant number, since it is smaller than the sum of its proper divisors (708119760).

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

408067728 is a wasteful number, since it uses less digits than its factorization.

408067728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500111 (or 500105 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 408067728 is about 20200.6863249742. The cubic root of 408067728 is about 741.7269915387.

The spelling of 408067728 in words is "four hundred eight million, sixty-seven thousand, seven hundred twenty-eight".