308545040 has 20 divisors (see below), whose sum is σ = 717367404. Its totient is φ = 123417984.

The previous prime is 308545021. The next prime is 308545051. The reversal of 308545040 is 40545803.

It can be written as a sum of positive squares in 2 ways, for example, as 87011584 + 221533456 = 9328^2 + 14884^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 308544994 and 308545012.

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, 1928327 + ... + 1928486.

Almost surely, 2^308545040 is an apocalyptic number.

It is an amenable number.

308545040 is an abundant number, since it is smaller than the sum of its proper divisors (408822364).

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

308545040 is a wasteful number, since it uses less digits than its factorization.

308545040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856826 (or 3856820 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 308545040 is about 17565.4501792581. The cubic root of 308545040 is about 675.7294647070.

The spelling of 308545040 in words is "three hundred eight million, five hundred forty-five thousand, forty".