70809420 has 96 divisors (see below), whose sum is σ = 229049856. Its totient is φ = 16153600.

The previous prime is 70809407. The next prime is 70809443. The reversal of 70809420 is 2490807.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8065 + ... + 14375.

It is an arithmetic number, because the mean of its divisors is an integer number (2385936).

Almost surely, 2^70809420 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 70809420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114524928).

70809420 is an abundant number, since it is smaller than the sum of its proper divisors (158240436).

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

70809420 is a wasteful number, since it uses less digits than its factorization.

70809420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351 (or 6349 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 70809420 is about 8414.8333316828. The cubic root of 70809420 is about 413.7109466825.

The spelling of 70809420 in words is "seventy million, eight hundred nine thousand, four hundred twenty".