255390408 has 320 divisors, whose sum is σ = 907441920. Its totient is φ = 65318400.

The previous prime is 255390407. The next prime is 255390437. The reversal of 255390408 is 804093552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255390407) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3597013 + ... + 3597083.

It is an arithmetic number, because the mean of its divisors is an integer number (2835756).

Almost surely, 2^255390408 is an apocalyptic number.

255390408 is a gapful number since it is divisible by the number (28) 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 255390408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453720960).

255390408 is an abundant number, since it is smaller than the sum of its proper divisors (652051512).

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

255390408 is a wasteful number, since it uses less digits than its factorization.

255390408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 255390408 is about 15980.9388960724. The cubic root of 255390408 is about 634.4560269980.

The spelling of 255390408 in words is "two hundred fifty-five million, three hundred ninety thousand, four hundred eight".