55722340 has 48 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 21365120.

The previous prime is 55722323. The next prime is 55722347. The reversal of 55722340 is 4322755.

It is a junction number, because it is equal to n+sod(n) for n = 55722299 and 55722308.

It is not an unprimeable number, because it can be changed into a prime (55722347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110529 + ... + 111031.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^55722340 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 55722340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60963840).

55722340 is an abundant number, since it is smaller than the sum of its proper divisors (66205340).

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

55722340 is a wasteful number, since it uses less digits than its factorization.

55722340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 55722340 is about 7464.7397811310. The cubic root of 55722340 is about 381.9528737676.

The spelling of 55722340 in words is "fifty-five million, seven hundred twenty-two thousand, three hundred forty".