70197840 has 240 divisors, whose sum is σ = 256733568. Its totient is φ = 17791488.

The previous prime is 70197839. The next prime is 70197851. The reversal of 70197840 is 4879107.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 70197795 and 70197804.

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, 447042 + ... + 447198.

Almost surely, 2^70197840 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 70197840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128366784).

70197840 is an abundant number, since it is smaller than the sum of its proper divisors (186535728).

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

70197840 is a wasteful number, since it uses less digits than its factorization.

70197840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 70197840 is about 8378.4151245925. The cubic root of 70197840 is about 412.5164290977.

The spelling of 70197840 in words is "seventy million, one hundred ninety-seven thousand, eight hundred forty".