70420320 has 96 divisors (see below), whose sum is σ = 246486240. Its totient is φ = 18777600.

The previous prime is 70420297. The next prime is 70420321. The reversal of 70420320 is 2302407.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 70420293 and 70420302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70420321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3831 + ... + 12470.

It is an arithmetic number, because the mean of its divisors is an integer number (2567565).

Almost surely, 2^70420320 is an apocalyptic number.

It is an amenable number.

70420320 is an abundant number, since it is smaller than the sum of its proper divisors (176065920).

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

70420320 is a wasteful number, since it uses less digits than its factorization.

70420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16325 (or 16311 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 70420320 is about 8391.6815954849. The cubic root of 70420320 is about 412.9517695048.

Adding to 70420320 its reverse (2302407), we get a palindrome (72722727).

The spelling of 70420320 in words is "seventy million, four hundred twenty thousand, three hundred twenty".