55620030 has 32 divisors (see below), whose sum is σ = 140515200. Its totient is φ = 14051232.

The previous prime is 55620023. The next prime is 55620041. The reversal of 55620030 is 3002655.

It is a junction number, because it is equal to n+sod(n) for n = 55619979 and 55620006.

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, 48220 + ... + 49359.

It is an arithmetic number, because the mean of its divisors is an integer number (4391100).

Almost surely, 2^55620030 is an apocalyptic number.

55620030 is an abundant number, since it is smaller than the sum of its proper divisors (84895170).

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

55620030 is a wasteful number, since it uses less digits than its factorization.

55620030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97608.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 55620030 is about 7457.8837480883. The cubic root of 55620030 is about 381.7189667486.

Adding to 55620030 its reverse (3002655), we get a palindrome (58622685).

The spelling of 55620030 in words is "fifty-five million, six hundred twenty thousand, thirty".