1620957358 has 4 divisors (see below), whose sum is σ = 2431436040. Its totient is φ = 810478678.

The previous prime is 1620957343. The next prime is 1620957379. The reversal of 1620957358 is 8537590261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8537590261 = 1601 ⋅5332661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405239338 + ... + 405239341.

It is an arithmetic number, because the mean of its divisors is an integer number (607859010).

Almost surely, 2^1620957358 is an apocalyptic number.

1620957358 is a deficient number, since it is larger than the sum of its proper divisors (810478682).

1620957358 is an equidigital number, since it uses as much as digits as its factorization.

1620957358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810478681.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 1620957358 is about 40261.1147138278. The cubic root of 1620957358 is about 1174.6916004867.

The spelling of 1620957358 in words is "one billion, six hundred twenty million, nine hundred fifty-seven thousand, three hundred fifty-eight".