308077142 has 4 divisors (see below), whose sum is σ = 462115716. Its totient is φ = 154038570.

The previous prime is 308077129. The next prime is 308077177. The reversal of 308077142 is 241770803.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 308077099 and 308077108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77019284 + ... + 77019287.

It is an arithmetic number, because the mean of its divisors is an integer number (115528929).

Almost surely, 2^308077142 is an apocalyptic number.

308077142 is a deficient number, since it is larger than the sum of its proper divisors (154038574).

308077142 is a wasteful number, since it uses less digits than its factorization.

308077142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154038573.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 308077142 is about 17552.1264238838. The cubic root of 308077142 is about 675.3877183594.

The spelling of 308077142 in words is "three hundred eight million, seventy-seven thousand, one hundred forty-two".