308030840 has 32 divisors (see below), whose sum is σ = 746383680. Its totient is φ = 113734272.

The previous prime is 308030819. The next prime is 308030843. The reversal of 308030840 is 48030803.

It is a super-2 number, since 2×308030840² = 189765996782211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308030843) 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, 295664 + ... + 296703.

It is an arithmetic number, because the mean of its divisors is an integer number (23324490).

Almost surely, 2^308030840 is an apocalyptic number.

It is an amenable number.

308030840 is an abundant number, since it is smaller than the sum of its proper divisors (438352840).

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

308030840 is a wasteful number, since it uses less digits than its factorization.

308030840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592391 (or 592387 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 308030840 is about 17550.8073888354. The cubic root of 308030840 is about 675.3538811970.

The spelling of 308030840 in words is "three hundred eight million, thirty thousand, eight hundred forty".