1620231356 has 12 divisors (see below), whose sum is σ = 2836972992. Its totient is φ = 809667648.

The previous prime is 1620231331. The next prime is 1620231367. The reversal of 1620231356 is 6531320261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103805 + ... + 118388.

It is an arithmetic number, because the mean of its divisors is an integer number (236414416).

Almost surely, 2^1620231356 is an apocalyptic number.

It is an amenable number.

1620231356 is a deficient number, since it is larger than the sum of its proper divisors (1216741636).

1620231356 is a wasteful number, since it uses less digits than its factorization.

1620231356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224020 (or 224018 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1620231356 is about 40252.0975354080. The cubic root of 1620231356 is about 1174.5161988325.

The spelling of 1620231356 in words is "one billion, six hundred twenty million, two hundred thirty-one thousand, three hundred fifty-six".