256449534 has 16 divisors (see below), whose sum is σ = 559526400. Its totient is φ = 77711960.

The previous prime is 256449533. The next prime is 256449559. The reversal of 256449534 is 435944652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256449533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942734 + ... + 1942865.

It is an arithmetic number, because the mean of its divisors is an integer number (34970400).

Almost surely, 2^256449534 is an apocalyptic number.

256449534 is an abundant number, since it is smaller than the sum of its proper divisors (303076866).

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

256449534 is a wasteful number, since it uses less digits than its factorization.

256449534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885615.

The product of its digits is 518400, while the sum is 42.

The square root of 256449534 is about 16014.0417758916. The cubic root of 256449534 is about 635.3318653003.

The spelling of 256449534 in words is "two hundred fifty-six million, four hundred forty-nine thousand, five hundred thirty-four".