823079970 has 24 divisors (see below), whose sum is σ = 2140008156. Its totient is φ = 219487968.

The previous prime is 823079969. The next prime is 823080029. The reversal of 823079970 is 79970328.

It can be written as a sum of positive squares in 2 ways, for example, as 803552409 + 19527561 = 28347^2 + 4419^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4572577 + ... + 4572756.

Almost surely, 2^823079970 is an apocalyptic number.

823079970 is an abundant number, since it is smaller than the sum of its proper divisors (1316928186).

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

823079970 is a wasteful number, since it uses less digits than its factorization.

823079970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145346 (or 9145343 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 823079970 is about 28689.3703311871. The cubic root of 823079970 is about 937.1605768596.

The spelling of 823079970 in words is "eight hundred twenty-three million, seventy-nine thousand, nine hundred seventy".