55620420 has 24 divisors (see below), whose sum is σ = 155737344. Its totient is φ = 14832096.

The previous prime is 55620407. The next prime is 55620427. The reversal of 55620420 is 2402655.

It is a super-2 number, since 2×55620420² = 6187262241952800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55620427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463444 + ... + 463563.

It is an arithmetic number, because the mean of its divisors is an integer number (6489056).

Almost surely, 2^55620420 is an apocalyptic number.

It is an amenable number.

55620420 is an abundant number, since it is smaller than the sum of its proper divisors (100116924).

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

55620420 is a wasteful number, since it uses less digits than its factorization.

55620420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927019 (or 927017 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55620420 is about 7457.9098948700. The cubic root of 55620420 is about 381.7198589335.

The spelling of 55620420 in words is "fifty-five million, six hundred twenty thousand, four hundred twenty".