1357639680 has 208 divisors, whose sum is σ = 4576475520. Its totient is φ = 342687744.

The previous prime is 1357639643. The next prime is 1357639721. The reversal of 1357639680 is 869367531.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1166779 + ... + 1167941.

Almost surely, 2^1357639680 is an apocalyptic number.

1357639680 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 1357639680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288237760).

1357639680 is an abundant number, since it is smaller than the sum of its proper divisors (3218835840).

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

1357639680 is a wasteful number, since it uses less digits than its factorization.

1357639680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 1357639680 is about 36846.1623510509. The cubic root of 1357639680 is about 1107.2903308751.

The spelling of 1357639680 in words is "one billion, three hundred fifty-seven million, six hundred thirty-nine thousand, six hundred eighty".