255779380 has 24 divisors (see below), whose sum is σ = 538076448. Its totient is φ = 102132768.

The previous prime is 255779341. The next prime is 255779383. The reversal of 255779380 is 83977552.

It is a self number, because there is not a number n which added to its sum of digits gives 255779380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255779383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 847 + ... + 22633.

It is an arithmetic number, because the mean of its divisors is an integer number (22419852).

Almost surely, 2^255779380 is an apocalyptic number.

255779380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255779380 is an abundant number, since it is smaller than the sum of its proper divisors (282297068).

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

255779380 is a wasteful number, since it uses less digits than its factorization.

255779380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22383 (or 22381 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 255779380 is about 15993.1041389719. The cubic root of 255779380 is about 634.7779660621. Note that the first 3 decimals are identical.

The spelling of 255779380 in words is "two hundred fifty-five million, seven hundred seventy-nine thousand, three hundred eighty".