264478340 has 24 divisors (see below), whose sum is σ = 634748352. Its totient is φ = 90678240.

The previous prime is 264478339. The next prime is 264478349. The reversal of 264478340 is 43874462.

It is a junction number, because it is equal to n+sod(n) for n = 264478294 and 264478303.

It is not an unprimeable number, because it can be changed into a prime (264478349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944426 + ... + 944705.

It is an arithmetic number, because the mean of its divisors is an integer number (26447848).

Almost surely, 2^264478340 is an apocalyptic number.

264478340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264478340 is an abundant number, since it is smaller than the sum of its proper divisors (370270012).

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

264478340 is a wasteful number, since it uses less digits than its factorization.

264478340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889147 (or 1889145 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 38.

The square root of 264478340 is about 16262.7900435319. The cubic root of 264478340 is about 641.8940796974.

The spelling of 264478340 in words is "two hundred sixty-four million, four hundred seventy-eight thousand, three hundred forty".