56723690 has 8 divisors (see below), whose sum is σ = 102102660. Its totient is φ = 22689472.

The previous prime is 56723677. The next prime is 56723699. The reversal of 56723690 is 9632765.

It can be written as a sum of positive squares in 2 ways, for example, as 47789569 + 8934121 = 6913^2 + 2989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×56723690² = 6435154014432200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56723699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2836175 + ... + 2836194.

Almost surely, 2^56723690 is an apocalyptic number.

56723690 is a deficient number, since it is larger than the sum of its proper divisors (45378970).

56723690 is a wasteful number, since it uses less digits than its factorization.

56723690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672376.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 56723690 is about 7531.5131281835. The cubic root of 56723690 is about 384.2272463152.

The spelling of 56723690 in words is "fifty-six million, seven hundred twenty-three thousand, six hundred ninety".