306812040 has 64 divisors (see below), whose sum is σ = 925819200. Its totient is φ = 81338112.

The previous prime is 306812021. The next prime is 306812041. The reversal of 306812040 is 40218603.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 306812040.

It is not an unprimeable number, because it can be changed into a prime (306812041) 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, 13371 + ... + 28149.

It is an arithmetic number, because the mean of its divisors is an integer number (14465925).

Almost surely, 2^306812040 is an apocalyptic number.

306812040 is a gapful number since it is divisible by the number (30) 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 306812040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462909600).

306812040 is an abundant number, since it is smaller than the sum of its proper divisors (619007160).

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

306812040 is a wasteful number, since it uses less digits than its factorization.

306812040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14966 (or 14962 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 306812040 is about 17516.0509247947. The cubic root of 306812040 is about 674.4619690639.

The spelling of 306812040 in words is "three hundred six million, eight hundred twelve thousand, forty".