70420840 has 192 divisors, whose sum is σ = 203558400. Its totient is φ = 21772800.

The previous prime is 70420829. The next prime is 70420841. The reversal of 70420840 is 4802407.

It is not an unprimeable number, because it can be changed into a prime (70420841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1154410 + ... + 1154470.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200).

Almost surely, 2^70420840 is an apocalyptic number.

70420840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70420840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101779200).

70420840 is an abundant number, since it is smaller than the sum of its proper divisors (133137560).

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

70420840 is a wasteful number, since it uses less digits than its factorization.

70420840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 70420840 is about 8391.7125784908. The cubic root of 70420840 is about 412.9527859462.

The spelling of 70420840 in words is "seventy million, four hundred twenty thousand, eight hundred forty".