1620971358 has 64 divisors (see below), whose sum is σ = 3476029440. Its totient is φ = 502461792.

The previous prime is 1620971347. The next prime is 1620971371. The reversal of 1620971358 is 8531790261.

1620971358 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1490691 + ... + 1491777.

It is an arithmetic number, because the mean of its divisors is an integer number (54312960).

Almost surely, 2^1620971358 is an apocalyptic number.

1620971358 is an abundant number, since it is smaller than the sum of its proper divisors (1855058082).

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

1620971358 is a wasteful number, since it uses less digits than its factorization.

1620971358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1620971358 is about 40261.2885784844. The cubic root of 1620971358 is about 1174.6949823636.

The spelling of 1620971358 in words is "one billion, six hundred twenty million, nine hundred seventy-one thousand, three hundred fifty-eight".