828940957 has 4 divisors (see below), whose sum is σ = 892705660. Its totient is φ = 765176256.

The previous prime is 828940921. The next prime is 828940991. The reversal of 828940957 is 759049828.

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

It can be written as a sum of positive squares in 2 ways, for example, as 520798041 + 308142916 = 22821^2 + 17554^2 .

It is a de Polignac number, because none of the positive numbers 2^k-828940957 is a prime.

It is a super-2 number, since 2×828940957² = 1374286220384151698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828940997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31882332 + ... + 31882357.

It is an arithmetic number, because the mean of its divisors is an integer number (223176415).

Almost surely, 2^828940957 is an apocalyptic number.

It is an amenable number.

828940957 is a deficient number, since it is larger than the sum of its proper divisors (63764703).

828940957 is a wasteful number, since it uses less digits than its factorization.

828940957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63764702.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 828940957 is about 28791.3347554433. The cubic root of 828940957 is about 939.3797617313.

The spelling of 828940957 in words is "eight hundred twenty-eight million, nine hundred forty thousand, nine hundred fifty-seven".