70823830 has 128 divisors (see below), whose sum is σ = 172523520. Its totient is φ = 20269440.

The previous prime is 70823827. The next prime is 70823833. The reversal of 70823830 is 3832807.

It is an interprime number because it is at equal distance from previous prime (70823827) and next prime (70823833).

It is a junction number, because it is equal to n+sod(n) for n = 70823792 and 70823801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70823833) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 687559 + ... + 687661.

It is an arithmetic number, because the mean of its divisors is an integer number (1347840).

Almost surely, 2^70823830 is an apocalyptic number.

70823830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

70823830 is an abundant number, since it is smaller than the sum of its proper divisors (101699690).

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

70823830 is a wasteful number, since it uses less digits than its factorization.

70823830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 70823830 is about 8415.6895142347. The cubic root of 70823830 is about 413.7390087228.

The spelling of 70823830 in words is "seventy million, eight hundred twenty-three thousand, eight hundred thirty".