309363740 has 24 divisors (see below), whose sum is σ = 742473312. Its totient is φ = 106067520.

The previous prime is 309363713. The next prime is 309363779. The reversal of 309363740 is 47363903.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 309363740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1104731 + ... + 1105010.

It is an arithmetic number, because the mean of its divisors is an integer number (30936388).

Almost surely, 2^309363740 is an apocalyptic number.

It is an amenable number.

309363740 is an abundant number, since it is smaller than the sum of its proper divisors (433109572).

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

309363740 is a wasteful number, since it uses less digits than its factorization.

309363740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209757 (or 2209755 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 309363740 is about 17588.7390110832. The cubic root of 309363740 is about 676.3266018645.

The spelling of 309363740 in words is "three hundred nine million, three hundred sixty-three thousand, seven hundred forty".