70840240 has 20 divisors (see below), whose sum is σ = 164703744. Its totient is φ = 28336064.

The previous prime is 70840229. The next prime is 70840249. The reversal of 70840240 is 4204807.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (70840249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442672 + ... + 442831.

Almost surely, 2^70840240 is an apocalyptic number.

It is an amenable number.

70840240 is an abundant number, since it is smaller than the sum of its proper divisors (93863504).

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

70840240 is a wasteful number, since it uses less digits than its factorization.

70840240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885516 (or 885510 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 70840240 is about 8416.6644224419. The cubic root of 70840240 is about 413.7709609288.

The spelling of 70840240 in words is "seventy million, eight hundred forty thousand, two hundred forty".