70215940 has 24 divisors (see below), whose sum is σ = 148763160. Its totient is φ = 27836928.

The previous prime is 70215917. The next prime is 70215953. The reversal of 70215940 is 4951207.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58564 + 70157376 = 242^2 + 8376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 70215899 and 70215908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13275 + ... + 17794.

It is an arithmetic number, because the mean of its divisors is an integer number (6198465).

Almost surely, 2^70215940 is an apocalyptic number.

It is an amenable number.

70215940 is an abundant number, since it is smaller than the sum of its proper divisors (78547220).

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

70215940 is a wasteful number, since it uses less digits than its factorization.

70215940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31191 (or 31189 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 70215940 is about 8379.4952115268. The cubic root of 70215940 is about 412.5518808330.

The spelling of 70215940 in words is "seventy million, two hundred fifteen thousand, nine hundred forty".