1309346890 has 32 divisors (see below), whose sum is σ = 2417071104. Its totient is φ = 510380160.

The previous prime is 1309346881. The next prime is 1309346893. The reversal of 1309346890 is 986439031.

It is not an unprimeable number, because it can be changed into a prime (1309346893) 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, 592167 + ... + 594373.

It is an arithmetic number, because the mean of its divisors is an integer number (75533472).

Almost surely, 2^1309346890 is an apocalyptic number.

1309346890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309346890 is a deficient number, since it is larger than the sum of its proper divisors (1107724214).

1309346890 is a wasteful number, since it uses less digits than its factorization.

1309346890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1309346890 is about 36184.8986457058. The cubic root of 1309346890 is about 1094.0023133168.

The spelling of 1309346890 in words is "one billion, three hundred nine million, three hundred forty-six thousand, eight hundred ninety".