256419492 has 48 divisors (see below), whose sum is σ = 699697152. Its totient is φ = 71557920.

The previous prime is 256419473. The next prime is 256419503. The reversal of 256419492 is 294914652.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31884 + ... + 39107.

It is an arithmetic number, because the mean of its divisors is an integer number (14577024).

Almost surely, 2^256419492 is an apocalyptic number.

It is an amenable number.

256419492 is an abundant number, since it is smaller than the sum of its proper divisors (443277660).

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

256419492 is a wasteful number, since it uses less digits than its factorization.

256419492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71048 (or 71046 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 256419492 is about 16013.1037591093. The cubic root of 256419492 is about 635.3070554999.

The spelling of 256419492 in words is "two hundred fifty-six million, four hundred nineteen thousand, four hundred ninety-two".