309480000 has 140 divisors (see below), whose sum is σ = 1023609840. Its totient is φ = 82496000.

The previous prime is 309479977. The next prime is 309480001. The reversal of 309480000 is 84903.

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

It is not an unprimeable number, because it can be changed into a prime (309480001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118711 + ... + 121289.

Almost surely, 2^309480000 is an apocalyptic number.

309480000 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 309480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511804920).

309480000 is an abundant number, since it is smaller than the sum of its proper divisors (714129840).

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

309480000 is an equidigital number, since it uses as much as digits as its factorization.

309480000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614 (or 2589 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 309480000 is about 17592.0436561532. The cubic root of 309480000 is about 676.4113132391.

The spelling of 309480000 in words is "three hundred nine million, four hundred eighty thousand".