857996434 has 4 divisors (see below), whose sum is σ = 1286994654. Its totient is φ = 428998216.

The previous prime is 857996431. The next prime is 857996437. The reversal of 857996434 is 434699758.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (857996431) and next prime (857996437).

It can be written as a sum of positive squares in only one way, i.e., 771450625 + 86545809 = 27775^2 + 9303^2 .

It is not an unprimeable number, because it can be changed into a prime (857996431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214499107 + ... + 214499110.

Almost surely, 2^857996434 is an apocalyptic number.

857996434 is a deficient number, since it is larger than the sum of its proper divisors (428998220).

857996434 is a wasteful number, since it uses less digits than its factorization.

857996434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428998219.

The product of its digits is 6531840, while the sum is 55.

The square root of 857996434 is about 29291.5761610740. The cubic root of 857996434 is about 950.2294677451.

The spelling of 857996434 in words is "eight hundred fifty-seven million, nine hundred ninety-six thousand, four hundred thirty-four".