1339428761 has 16 divisors (see below), whose sum is σ = 1472368128. Its totient is φ = 1208390400.

The previous prime is 1339428743. The next prime is 1339428763. The reversal of 1339428761 is 1678249331.

It is a cyclic number.

It is not a de Polignac number, because 1339428761 - 2¹⁰ = 1339427737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1339428763) 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, 1032065 + ... + 1033361.

It is an arithmetic number, because the mean of its divisors is an integer number (92023008).

Almost surely, 2^1339428761 is an apocalyptic number.

1339428761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1339428761 is a deficient number, since it is larger than the sum of its proper divisors (132939367).

1339428761 is a wasteful number, since it uses less digits than its factorization.

1339428761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952.

The product of its digits is 217728, while the sum is 44.

The square root of 1339428761 is about 36598.2070735712. The cubic root of 1339428761 is about 1102.3170884829.

The spelling of 1339428761 in words is "one billion, three hundred thirty-nine million, four hundred twenty-eight thousand, seven hundred sixty-one".