178009012 has 6 divisors (see below), whose sum is σ = 311515778. Its totient is φ = 89004504.

The previous prime is 178008991. The next prime is 178009019. The reversal of 178009012 is 210900871.

178009012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 174345616 + 3663396 = 13204^2 + 1914^2 .

It is a super-2 number, since 2×178009012² = 63374416706432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178009019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22251123 + ... + 22251130.

Almost surely, 2^178009012 is an apocalyptic number.

It is an amenable number.

178009012 is a deficient number, since it is larger than the sum of its proper divisors (133506766).

178009012 is a wasteful number, since it uses less digits than its factorization.

178009012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44502257 (or 44502255 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 178009012 is about 13342.0017988306. The cubic root of 178009012 is about 562.5321260335.

Adding to 178009012 its reverse (210900871), we get a palindrome (388909883).

The spelling of 178009012 in words is "one hundred seventy-eight million, nine thousand, twelve".