55809738 has 24 divisors (see below), whose sum is σ = 121738500. Its totient is φ = 18477504.

The previous prime is 55809709. The next prime is 55809773. The reversal of 55809738 is 83790855.

55809738 is a `hidden beast` number, since 558 + 0 + 97 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49322529 + 6487209 = 7023^2 + 2547^2 .

It is a super-2 number, since 2×55809738² = 6229453711257288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55809693 and 55809702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7723 + ... + 13086.

Almost surely, 2^55809738 is an apocalyptic number.

55809738 is an abundant number, since it is smaller than the sum of its proper divisors (65928762).

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

55809738 is a wasteful number, since it uses less digits than its factorization.

55809738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20966 (or 20963 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 55809738 is about 7470.5915428432. The cubic root of 55809738 is about 382.1524614600.

The spelling of 55809738 in words is "fifty-five million, eight hundred nine thousand, seven hundred thirty-eight".