70710640 has 160 divisors (see below), whose sum is σ = 220985856. Its totient is φ = 20321280.

The previous prime is 70710623. The next prime is 70710643. The reversal of 70710640 is 4601707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70710643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79639 + ... + 80521.

Almost surely, 2^70710640 is an apocalyptic number.

70710640 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 70710640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110492928).

70710640 is an abundant number, since it is smaller than the sum of its proper divisors (150275216).

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

70710640 is a wasteful number, since it uses less digits than its factorization.

70710640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 70710640 is about 8408.9618859881. The cubic root of 70710640 is about 413.5184798936.

The spelling of 70710640 in words is "seventy million, seven hundred ten thousand, six hundred forty".