55920500 has 48 divisors (see below), whose sum is σ = 123496464. Its totient is φ = 22118400.

The previous prime is 55920479. The next prime is 55920539. The reversal of 55920500 is 502955.

It can be written as a sum of positive squares in 8 ways, for example, as 11751184 + 44169316 = 3428^2 + 6646^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55920500.

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, 47924 + ... + 49076.

It is an arithmetic number, because the mean of its divisors is an integer number (2572843).

Almost surely, 2^55920500 is an apocalyptic number.

55920500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55920500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61748232).

55920500 is an abundant number, since it is smaller than the sum of its proper divisors (67575964).

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

55920500 is a wasteful number, since it uses less digits than its factorization.

55920500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55920500 is about 7478.0010698047. The cubic root of 55920500 is about 382.4051055410.

The spelling of 55920500 in words is "fifty-five million, nine hundred twenty thousand, five hundred".