70784420 has 36 divisors (see below), whose sum is σ = 172918620. Its totient is φ = 24268608.

The previous prime is 70784419. The next prime is 70784431. The reversal of 70784420 is 2448707.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 53611684 = 4144^2 + 7322^2 .

It is a super-2 number, since 2×70784420² = 10020868229472800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35135 + ... + 37094.

It is an arithmetic number, because the mean of its divisors is an integer number (4803295).

Almost surely, 2^70784420 is an apocalyptic number.

70784420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70784420 is an abundant number, since it is smaller than the sum of its proper divisors (102134200).

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

70784420 is a wasteful number, since it uses less digits than its factorization.

70784420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72252 (or 72243 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 70784420 is about 8413.3477284610. The cubic root of 70784420 is about 413.6622526382.

The spelling of 70784420 in words is "seventy million, seven hundred eighty-four thousand, four hundred twenty".