308857144 has 16 divisors (see below), whose sum is σ = 581157720. Its totient is φ = 153881760.

The previous prime is 308857121. The next prime is 308857147. The reversal of 308857144 is 441758803.

It is a junction number, because it is equal to n+sod(n) for n = 308857097 and 308857106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308857147) 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, 65947 + ... + 70474.

Almost surely, 2^308857144 is an apocalyptic number.

It is an amenable number.

308857144 is a deficient number, since it is larger than the sum of its proper divisors (272300576).

308857144 is a wasteful number, since it uses less digits than its factorization.

308857144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136710 (or 136706 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 308857144 is about 17574.3319645442. The cubic root of 308857144 is about 675.9572291836.

The spelling of 308857144 in words is "three hundred eight million, eight hundred fifty-seven thousand, one hundred forty-four".