306746642 has 4 divisors (see below), whose sum is σ = 460119966. Its totient is φ = 153373320.

The previous prime is 306746641. The next prime is 306746663. The reversal of 306746642 is 246647603.

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

It can be written as a sum of positive squares in only one way, i.e., 266309761 + 40436881 = 16319^2 + 6359^2 .

It is a junction number, because it is equal to n+sod(n) for n = 306746596 and 306746605.

It is not an unprimeable number, because it can be changed into a prime (306746641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76686659 + ... + 76686662.

Almost surely, 2^306746642 is an apocalyptic number.

306746642 is a deficient number, since it is larger than the sum of its proper divisors (153373324).

306746642 is a wasteful number, since it uses less digits than its factorization.

306746642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153373323.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 306746642 is about 17514.1840232424. The cubic root of 306746642 is about 674.4140443930.

The spelling of 306746642 in words is "three hundred six million, seven hundred forty-six thousand, six hundred forty-two".