70205100 has 144 divisors (see below), whose sum is σ = 235151616. Its totient is φ = 15840000.

The previous prime is 70205099. The next prime is 70205117. The reversal of 70205100 is 150207.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 70205100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211935 + ... + 212265.

Almost surely, 2^70205100 is an apocalyptic number.

70205100 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70205100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117575808).

70205100 is an abundant number, since it is smaller than the sum of its proper divisors (164946516).

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

70205100 is a wasteful number, since it uses less digits than its factorization.

70205100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 70205100 is about 8378.8483695553. The cubic root of 70205100 is about 412.5306496969.

Adding to 70205100 its reverse (150207), we get a palindrome (70355307).

The spelling of 70205100 in words is "seventy million, two hundred five thousand, one hundred".