55802840 has 64 divisors (see below), whose sum is σ = 134136000. Its totient is φ = 20819968.

The previous prime is 55802837. The next prime is 55802897. The reversal of 55802840 is 4820855.

55802840 = T₉₆ + T₉₇ + ... + T₆₉₄.

It is a super-2 number, since 2×55802840² = 6227913904131200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55802797 and 55802806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92861 + ... + 93459.

It is an arithmetic number, because the mean of its divisors is an integer number (2095875).

Almost surely, 2^55802840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55802840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67068000).

55802840 is an abundant number, since it is smaller than the sum of its proper divisors (78333160).

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

55802840 is a wasteful number, since it uses less digits than its factorization.

55802840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 55802840 is about 7470.1298516157. The cubic root of 55802840 is about 382.1367163207.

The spelling of 55802840 in words is "fifty-five million, eight hundred two thousand, eight hundred forty".