1339691040 has 144 divisors (see below), whose sum is σ = 4719326976. Its totient is φ = 345715200.

The previous prime is 1339691029. The next prime is 1339691053. The reversal of 1339691040 is 401969331.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1339690986 and 1339691004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29635 + ... + 59645.

It is an arithmetic number, because the mean of its divisors is an integer number (32773104).

Almost surely, 2^1339691040 is an apocalyptic number.

1339691040 is a gapful number since it is divisible by the number (10) 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 1339691040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359663488).

1339691040 is an abundant number, since it is smaller than the sum of its proper divisors (3379635936).

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

1339691040 is a wasteful number, since it uses less digits than its factorization.

1339691040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30063 (or 30052 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 1339691040 is about 36601.7901201567. The cubic root of 1339691040 is about 1102.3890335198.

The spelling of 1339691040 in words is "one billion, three hundred thirty-nine million, six hundred ninety-one thousand, forty".