55773900 has 288 divisors, whose sum is σ = 221652480. Its totient is φ = 11715840.

The previous prime is 55773877. The next prime is 55773901. The reversal of 55773900 is 937755.

55773900 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55773900² = 6221455842420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

55773900 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (55773901) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 245587 + ... + 245813.

Almost surely, 2^55773900 is an apocalyptic number.

55773900 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 55773900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110826240).

55773900 is an abundant number, since it is smaller than the sum of its proper divisors (165878580).

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

55773900 is a wasteful number, since it uses less digits than its factorization.

55773900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 33075, while the sum is 36.

The square root of 55773900 is about 7468.1925524186. The cubic root of 55773900 is about 382.0706447199.

The spelling of 55773900 in words is "fifty-five million, seven hundred seventy-three thousand, nine hundred".