70820420 has 24 divisors (see below), whose sum is σ = 162243648. Its totient is φ = 25752800.

The previous prime is 70820417. The next prime is 70820443. The reversal of 70820420 is 2402807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160736 + ... + 161175.

It is an arithmetic number, because the mean of its divisors is an integer number (6760152).

Almost surely, 2^70820420 is an apocalyptic number.

It is an amenable number.

70820420 is an abundant number, since it is smaller than the sum of its proper divisors (91423228).

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

70820420 is a wasteful number, since it uses less digits than its factorization.

70820420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321931 (or 321929 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 70820420 is about 8415.4869140175. The cubic root of 70820420 is about 413.7323684311.

The spelling of 70820420 in words is "seventy million, eight hundred twenty thousand, four hundred twenty".