1356493820 has 24 divisors (see below), whose sum is σ = 3107604528. Its totient is φ = 493270400.

The previous prime is 1356493777. The next prime is 1356493823. The reversal of 1356493820 is 283946531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356493823) 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, 3082721 + ... + 3083160.

It is an arithmetic number, because the mean of its divisors is an integer number (129483522).

Almost surely, 2^1356493820 is an apocalyptic number.

1356493820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356493820 is an abundant number, since it is smaller than the sum of its proper divisors (1751110708).

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

1356493820 is a wasteful number, since it uses less digits than its factorization.

1356493820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165901 (or 6165899 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1356493820 is about 36830.6098238951. The cubic root of 1356493820 is about 1106.9787222198.

The spelling of 1356493820 in words is "one billion, three hundred fifty-six million, four hundred ninety-three thousand, eight hundred twenty".