55765380 has 96 divisors (see below), whose sum is σ = 179343360. Its totient is φ = 12804480.

The previous prime is 55765343. The next prime is 55765403. The reversal of 55765380 is 8356755.

It is a super-3 number, since 3×55765380³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10317 + ... + 14763.

It is an arithmetic number, because the mean of its divisors is an integer number (1868160).

Almost surely, 2^55765380 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 55765380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89671680).

55765380 is an abundant number, since it is smaller than the sum of its proper divisors (123577980).

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

55765380 is a wasteful number, since it uses less digits than its factorization.

55765380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489 (or 4487 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 55765380 is about 7467.6221114890. The cubic root of 55765380 is about 382.0511887398.

The spelling of 55765380 in words is "fifty-five million, seven hundred sixty-five thousand, three hundred eighty".