1309266672 has 160 divisors (see below), whose sum is σ = 3972364800. Its totient is φ = 371427840.

The previous prime is 1309266619. The next prime is 1309266731. The reversal of 1309266672 is 2766629031.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4626243 + ... + 4626525.

It is an arithmetic number, because the mean of its divisors is an integer number (24827280).

Almost surely, 2^1309266672 is an apocalyptic number.

1309266672 is a gapful number since it is divisible by the number (12) 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 1309266672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986182400).

1309266672 is an abundant number, since it is smaller than the sum of its proper divisors (2663098128).

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

1309266672 is a wasteful number, since it uses less digits than its factorization.

1309266672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 576 counting only the distinct ones).

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

The square root of 1309266672 is about 36183.7901828982. The cubic root of 1309266672 is about 1093.9799712696.

The spelling of 1309266672 in words is "one billion, three hundred nine million, two hundred sixty-six thousand, six hundred seventy-two".