70497640 has 64 divisors (see below), whose sum is σ = 171927360. Its totient is φ = 25912320.

The previous prime is 70497631. The next prime is 70497641. The reversal of 70497640 is 4679407.

It is a self number, because there is not a number n which added to its sum of digits gives 70497640.

It is not an unprimeable number, because it can be changed into a prime (70497641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28035 + ... + 30445.

It is an arithmetic number, because the mean of its divisors is an integer number (2686365).

Almost surely, 2^70497640 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 70497640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85963680).

70497640 is an abundant number, since it is smaller than the sum of its proper divisors (101429720).

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

70497640 is a wasteful number, since it uses less digits than its factorization.

70497640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 70497640 is about 8396.2872747423. The cubic root of 70497640 is about 413.1028516167.

The spelling of 70497640 in words is "seventy million, four hundred ninety-seven thousand, six hundred forty".