70271640 has 192 divisors, whose sum is σ = 242611200. Its totient is φ = 17611776.

The previous prime is 70271629. The next prime is 70271653. The reversal of 70271640 is 4617207.

It is a congruent number.

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, 553257 + ... + 553383.

It is an arithmetic number, because the mean of its divisors is an integer number (1263600).

Almost surely, 2^70271640 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 70271640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121305600).

70271640 is an abundant number, since it is smaller than the sum of its proper divisors (172339560).

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

70271640 is a wasteful number, since it uses less digits than its factorization.

70271640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 70271640 is about 8382.8181418900. The cubic root of 70271640 is about 412.6609399547.

Adding to 70271640 its reverse (4617207), we get a palindrome (74888847).

The spelling of 70271640 in words is "seventy million, two hundred seventy-one thousand, six hundred forty".