851057738 has 4 divisors (see below), whose sum is σ = 1276586610. Its totient is φ = 425528868.

The previous prime is 851057737. The next prime is 851057749. The reversal of 851057738 is 837750158.

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

It can be written as a sum of positive squares in only one way, i.e., 846053569 + 5004169 = 29087^2 + 2237^2 .

It is not an unprimeable number, because it can be changed into a prime (851057737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212764433 + ... + 212764436.

Almost surely, 2^851057738 is an apocalyptic number.

851057738 is a deficient number, since it is larger than the sum of its proper divisors (425528872).

851057738 is a wasteful number, since it uses less digits than its factorization.

851057738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425528871.

The product of its (nonzero) digits is 235200, while the sum is 44.

The square root of 851057738 is about 29172.8938914191. The cubic root of 851057738 is about 947.6610004349.

The spelling of 851057738 in words is "eight hundred fifty-one million, fifty-seven thousand, seven hundred thirty-eight".