70431660 has 192 divisors, whose sum is σ = 240844800. Its totient is φ = 16982784.

The previous prime is 70431649. The next prime is 70431661. The reversal of 70431660 is 6613407.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (70431661) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 554517 + ... + 554643.

It is an arithmetic number, because the mean of its divisors is an integer number (1254400).

Almost surely, 2^70431660 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 70431660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120422400).

70431660 is an abundant number, since it is smaller than the sum of its proper divisors (170413140).

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

70431660 is a wasteful number, since it uses less digits than its factorization.

70431660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 70431660 is about 8392.3572373916. The cubic root of 70431660 is about 412.9739346115.

The spelling of 70431660 in words is "seventy million, four hundred thirty-one thousand, six hundred sixty".