30772738 has 4 divisors (see below), whose sum is σ = 46159110. Its totient is φ = 15386368.

The previous prime is 30772717. The next prime is 30772757. The reversal of 30772738 is 83727703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83727703 = 17 ⋅4925159.

It can be written as a sum of positive squares in only one way, i.e., 28483569 + 2289169 = 5337^2 + 1513^2 .

It is a super-2 number, since 2×30772738² = 1893922808033288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30772697 and 30772706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7693183 + ... + 7693186.

Almost surely, 2^30772738 is an apocalyptic number.

30772738 is a deficient number, since it is larger than the sum of its proper divisors (15386372).

30772738 is a wasteful number, since it uses less digits than its factorization.

30772738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15386371.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 30772738 is about 5547.3180907534. The cubic root of 30772738 is about 313.3685295708.

The spelling of 30772738 in words is "thirty million, seven hundred seventy-two thousand, seven hundred thirty-eight".