70281000 has 256 divisors, whose sum is σ = 258336000. Its totient is φ = 17625600.

The previous prime is 70280989. The next prime is 70281017. The reversal of 70281000 is 18207.

It is a super-2 number, since 2×70281000² = 9878837922000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 512932 + ... + 513068.

It is an arithmetic number, because the mean of its divisors is an integer number (1009125).

Almost surely, 2^70281000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70281000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129168000).

70281000 is an abundant number, since it is smaller than the sum of its proper divisors (188055000).

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

70281000 is a wasteful number, since it uses less digits than its factorization.

70281000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 70281000 is about 8383.3764081067. The cubic root of 70281000 is about 412.6792609299.

Adding to 70281000 its reverse (18207), we get a palindrome (70299207).

The spelling of 70281000 in words is "seventy million, two hundred eighty-one thousand".