306863970 has 96 divisors (see below), whose sum is σ = 861840000. Its totient is φ = 69721344.

The previous prime is 306863969. The next prime is 306863981. The reversal of 306863970 is 79368603.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292006 + ... + 293054.

It is an arithmetic number, because the mean of its divisors is an integer number (8977500).

Almost surely, 2^306863970 is an apocalyptic number.

306863970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 306863970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430920000).

306863970 is an abundant number, since it is smaller than the sum of its proper divisors (554976030).

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

306863970 is a wasteful number, since it uses less digits than its factorization.

306863970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 306863970 is about 17517.5332167517. The cubic root of 306863970 is about 674.5000193245.

The spelling of 306863970 in words is "three hundred six million, eight hundred sixty-three thousand, nine hundred seventy".