1357257330 has 128 divisors (see below), whose sum is σ = 4252227840. Its totient is φ = 303713280.

The previous prime is 1357257313. The next prime is 1357257331. The reversal of 1357257330 is 337527531.

1357257330 is a `hidden beast` number, since 1 + 3 + 57 + 2 + 573 + 30 = 666.

It is not an unprimeable number, because it can be changed into a prime (1357257331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21034 + ... + 56186.

It is an arithmetic number, because the mean of its divisors is an integer number (33220530).

Almost surely, 2^1357257330 is an apocalyptic number.

1357257330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1357257330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126113920).

1357257330 is an abundant number, since it is smaller than the sum of its proper divisors (2894970510).

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

1357257330 is a wasteful number, since it uses less digits than its factorization.

1357257330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35193 (or 35187 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 36.

The square root of 1357257330 is about 36840.9735213390. The cubic root of 1357257330 is about 1107.1863729509.

The spelling of 1357257330 in words is "one billion, three hundred fifty-seven million, two hundred fifty-seven thousand, three hundred thirty".