255363990 has 192 divisors, whose sum is σ = 772208640. Its totient is φ = 53706240.

The previous prime is 255363961. The next prime is 255364003. The reversal of 255363990 is 99363552.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1145019 + ... + 1145241.

It is an arithmetic number, because the mean of its divisors is an integer number (4021920).

Almost surely, 2^255363990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255363990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386104320).

255363990 is an abundant number, since it is smaller than the sum of its proper divisors (516844650).

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

255363990 is a wasteful number, since it uses less digits than its factorization.

255363990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 42.

The square root of 255363990 is about 15980.1123275151. The cubic root of 255363990 is about 634.4341498552.

The spelling of 255363990 in words is "two hundred fifty-five million, three hundred sixty-three thousand, nine hundred ninety".