70731420 has 96 divisors (see below), whose sum is σ = 205718016. Its totient is φ = 18144000.

The previous prime is 70731413. The next prime is 70731443. The reversal of 70731420 is 2413707.

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 31 ways as a sum of consecutive naturals, for example, 335115 + ... + 335325.

It is an arithmetic number, because the mean of its divisors is an integer number (2142896).

Almost surely, 2^70731420 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 70731420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102859008).

70731420 is an abundant number, since it is smaller than the sum of its proper divisors (134986596).

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

70731420 is a wasteful number, since it uses less digits than its factorization.

70731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 70731420 is about 8410.1973817503. The cubic root of 70731420 is about 413.5589833332.

The spelling of 70731420 in words is "seventy million, seven hundred thirty-one thousand, four hundred twenty".