1357477644 has 12 divisors (see below), whose sum is σ = 3167447864. Its totient is φ = 452492544.

The previous prime is 1357477643. The next prime is 1357477663. The reversal of 1357477644 is 4467747531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1357477593 and 1357477602.

It is not an unprimeable number, because it can be changed into a prime (1357477643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56561557 + ... + 56561580.

Almost surely, 2^1357477644 is an apocalyptic number.

It is an amenable number.

1357477644 is an abundant number, since it is smaller than the sum of its proper divisors (1809970220).

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

1357477644 is a wasteful number, since it uses less digits than its factorization.

1357477644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113123144 (or 113123142 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 48.

The square root of 1357477644 is about 36843.9634675750. The cubic root of 1357477644 is about 1107.2462769588.

The spelling of 1357477644 in words is "one billion, three hundred fifty-seven million, four hundred seventy-seven thousand, six hundred forty-four".