70191630 has 128 divisors (see below), whose sum is σ = 199065600. Its totient is φ = 17563392.

The previous prime is 70191613. The next prime is 70191661. The reversal of 70191630 is 3619107.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 70191594 and 70191603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 552627 + ... + 552753.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^70191630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70191630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99532800).

70191630 is an abundant number, since it is smaller than the sum of its proper divisors (128873970).

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

70191630 is a wasteful number, since it uses less digits than its factorization.

70191630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 70191630 is about 8378.0445212472. The cubic root of 70191630 is about 412.5042644187.

It can be divided in two parts, 7019 and 1630, that added together give a square (8649 = 93²).

The spelling of 70191630 in words is "seventy million, one hundred ninety-one thousand, six hundred thirty".