1357709540 has 72 divisors (see below), whose sum is σ = 3143331576. Its totient is φ = 492236800.

The previous prime is 1357709531. The next prime is 1357709579. The reversal of 1357709540 is 459077531.

It can be written as a sum of positive squares in 4 ways, for example, as 28815424 + 1328894116 = 5368^2 + 36454^2 .

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, 1115012 + ... + 1116228.

It is an arithmetic number, because the mean of its divisors is an integer number (43657383).

Almost surely, 2^1357709540 is an apocalyptic number.

1357709540 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 1357709540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571665788).

1357709540 is an abundant number, since it is smaller than the sum of its proper divisors (1785622036).

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

1357709540 is a wasteful number, since it uses less digits than its factorization.

1357709540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 1357709540 is about 36847.1103344618. The cubic root of 1357709540 is about 1107.3093231445.

The spelling of 1357709540 in words is "one billion, three hundred fifty-seven million, seven hundred nine thousand, five hundred forty".