181250740 has 36 divisors (see below), whose sum is σ = 418380228. Its totient is φ = 65908480.

The previous prime is 181250731. The next prime is 181250743. The reversal of 181250740 is 47052181.

It can be written as a sum of positive squares in 2 ways, for example, as 19554084 + 161696656 = 4422^2 + 12716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181250699 and 181250708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181250743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35029 + ... + 39868.

It is an arithmetic number, because the mean of its divisors is an integer number (11621673).

Almost surely, 2^181250740 is an apocalyptic number.

181250740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181250740 is an abundant number, since it is smaller than the sum of its proper divisors (237129488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181250740 is a wasteful number, since it uses less digits than its factorization.

181250740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74928 (or 74915 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 181250740 is about 13462.9395007183. The cubic root of 181250740 is about 565.9263681596.

The spelling of 181250740 in words is "one hundred eighty-one million, two hundred fifty thousand, seven hundred forty".