181372628 has 6 divisors (see below), whose sum is σ = 317402106. Its totient is φ = 90686312.

The previous prime is 181372603. The next prime is 181372657. The reversal of 181372628 is 826273181.

181372628 is digitally balanced in base 3, 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., 149132944 + 32239684 = 12212^2 + 5678^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181372591 and 181372600.

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, 22671575 + ... + 22671582.

It is an arithmetic number, because the mean of its divisors is an integer number (52900351).

Almost surely, 2^181372628 is an apocalyptic number.

It is an amenable number.

181372628 is a deficient number, since it is larger than the sum of its proper divisors (136029478).

181372628 is a wasteful number, since it uses less digits than its factorization.

181372628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45343161 (or 45343159 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 181372628 is about 13467.4655373608. The cubic root of 181372628 is about 566.0531983111.

The spelling of 181372628 in words is "one hundred eighty-one million, three hundred seventy-two thousand, six hundred twenty-eight".