1357444720 has 40 divisors (see below), whose sum is σ = 3166074144. Its totient is φ = 541254912.

The previous prime is 1357444703. The next prime is 1357444727. The reversal of 1357444720 is 274447531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1357444720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1357444727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404 + ... + 52123.

Almost surely, 2^1357444720 is an apocalyptic number.

1357444720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1357444720 is an abundant number, since it is smaller than the sum of its proper divisors (1808629424).

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

1357444720 is a wasteful number, since it uses less digits than its factorization.

1357444720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53857 (or 53851 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 1357444720 is about 36843.5166616869. The cubic root of 1357444720 is about 1107.2373252408.

The spelling of 1357444720 in words is "one billion, three hundred fifty-seven million, four hundred forty-four thousand, seven hundred twenty".