308752140 has 48 divisors (see below), whose sum is σ = 885598560. Its totient is φ = 80325120.

The previous prime is 308752139. The next prime is 308752163. The reversal of 308752140 is 41257803.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 308752098 and 308752107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60295 + ... + 65214.

It is an arithmetic number, because the mean of its divisors is an integer number (18449970).

Almost surely, 2^308752140 is an apocalyptic number.

308752140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

308752140 is an abundant number, since it is smaller than the sum of its proper divisors (576846420).

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

308752140 is a wasteful number, since it uses less digits than its factorization.

308752140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125562 (or 125560 counting only the distinct ones).

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

The square root of 308752140 is about 17571.3442855121. The cubic root of 308752140 is about 675.8806174345.

The spelling of 308752140 in words is "three hundred eight million, seven hundred fifty-two thousand, one hundred forty".