254540190 has 64 divisors (see below), whose sum is σ = 624245760. Its totient is φ = 66407040.

The previous prime is 254540171. The next prime is 254540191. The reversal of 254540190 is 91045452.

It is a super-2 number, since 2×254540190² = 129581416650472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254540191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 671421 + ... + 671799.

It is an arithmetic number, because the mean of its divisors is an integer number (9753840).

Almost surely, 2^254540190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 254540190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312122880).

254540190 is an abundant number, since it is smaller than the sum of its proper divisors (369705570).

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

254540190 is a wasteful number, since it uses less digits than its factorization.

254540190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 254540190 is about 15954.3157170717. The cubic root of 254540190 is about 633.7511902378.

The spelling of 254540190 in words is "two hundred fifty-four million, five hundred forty thousand, one hundred ninety".