4256397890 has 8 divisors (see below), whose sum is σ = 7661516220. Its totient is φ = 1702559152.

The previous prime is 4256397869. The next prime is 4256397907. The reversal of 4256397890 is 987936524.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3818374849 + 438023041 = 61793^2 + 20929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 212819885 + ... + 212819904.

Almost surely, 2^4256397890 is an apocalyptic number.

4256397890 is a deficient number, since it is larger than the sum of its proper divisors (3405118330).

4256397890 is a wasteful number, since it uses less digits than its factorization.

4256397890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425639796.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 4256397890 is about 65241.0751750766. The cubic root of 4256397890 is about 1620.6183040931.

The spelling of 4256397890 in words is "four billion, two hundred fifty-six million, three hundred ninety-seven thousand, eight hundred ninety".