55840426 has 8 divisors (see below), whose sum is σ = 83792484. Its totient is φ = 27909600.

The previous prime is 55840417. The next prime is 55840441. The reversal of 55840426 is 62404855.

It can be written as a sum of positive squares in 2 ways, for example, as 44957025 + 10883401 = 6705^2 + 3299^2 .

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

It is a super-2 number, since 2×55840426² = 6236306351722952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55840391 and 55840400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6726 + ... + 12526.

Almost surely, 2^55840426 is an apocalyptic number.

55840426 is a deficient number, since it is larger than the sum of its proper divisors (27952058).

55840426 is a wasteful number, since it uses less digits than its factorization.

55840426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 55840426 is about 7472.6451809249. The cubic root of 55840426 is about 382.2224931205. Note that the first 3 decimals are identical.

The spelling of 55840426 in words is "fifty-five million, eight hundred forty thousand, four hundred twenty-six".