408135072 has 24 divisors (see below), whose sum is σ = 1071354816. Its totient is φ = 136044992.

The previous prime is 408135071. The next prime is 408135073. The reversal of 408135072 is 270531804.

It is an interprime number because it is at equal distance from previous prime (408135071) and next prime (408135073).

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (408135071) 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, 2125608 + ... + 2125799.

It is an arithmetic number, because the mean of its divisors is an integer number (44639784).

Almost surely, 2^408135072 is an apocalyptic number.

It is an amenable number.

408135072 is an abundant number, since it is smaller than the sum of its proper divisors (663219744).

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

408135072 is a wasteful number, since it uses less digits than its factorization.

408135072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251420 (or 4251412 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 408135072 is about 20202.3531302668. The cubic root of 408135072 is about 741.7677920493.

Adding to 408135072 its reverse (270531804), we get a palindrome (678666876).

The spelling of 408135072 in words is "four hundred eight million, one hundred thirty-five thousand, seventy-two".