1357705440 has 432 divisors, whose sum is σ = 5740888608. Its totient is φ = 286101504.

The previous prime is 1357705379. The next prime is 1357705457. The reversal of 1357705440 is 445077531.

It is a happy number.

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 = 1357705395 and 1357705404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1703122 + ... + 1703918.

It is an arithmetic number, because the mean of its divisors is an integer number (13289094).

Almost surely, 2^1357705440 is an apocalyptic number.

1357705440 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 1357705440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2870444304).

1357705440 is an abundant number, since it is smaller than the sum of its proper divisors (4383183168).

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

1357705440 is a wasteful number, since it uses less digits than its factorization.

1357705440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 1357705440 is about 36847.0546991208. The cubic root of 1357705440 is about 1107.3082085289.

The spelling of 1357705440 in words is "one billion, three hundred fifty-seven million, seven hundred five thousand, four hundred forty".