255193740 has 168 divisors, whose sum is σ = 839528928. Its totient is φ = 65007360.

The previous prime is 255193733. The next prime is 255193753. The reversal of 255193740 is 47391552.

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

It is a junction number, because it is equal to n+sod(n) for n = 255193695 and 255193704.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 334960 + ... + 335720.

It is an arithmetic number, because the mean of its divisors is an integer number (4997196).

Almost surely, 2^255193740 is an apocalyptic number.

255193740 is a gapful number since it is divisible by the number (20) 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 255193740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419764464).

255193740 is an abundant number, since it is smaller than the sum of its proper divisors (584335188).

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

255193740 is a wasteful number, since it uses less digits than its factorization.

255193740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 255193740 is about 15974.7845055888. The cubic root of 255193740 is about 634.2931270656.

The spelling of 255193740 in words is "two hundred fifty-five million, one hundred ninety-three thousand, seven hundred forty".