70409020 has 24 divisors (see below), whose sum is σ = 161301168. Its totient is φ = 25603200.

The previous prime is 70408993. The next prime is 70409033. The reversal of 70409020 is 2090407.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 70408982 and 70409000.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 159801 + ... + 160240.

It is an arithmetic number, because the mean of its divisors is an integer number (6720882).

Almost surely, 2^70409020 is an apocalyptic number.

It is an amenable number.

70409020 is an abundant number, since it is smaller than the sum of its proper divisors (90892148).

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

70409020 is a wasteful number, since it uses less digits than its factorization.

70409020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320061 (or 320059 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 70409020 is about 8391.0082826797. The cubic root of 70409020 is about 412.9296802148.

Adding to 70409020 its reverse (2090407), we get a palindrome (72499427).

The spelling of 70409020 in words is "seventy million, four hundred nine thousand, twenty".