1620853752 has 48 divisors (see below), whose sum is σ = 4713710760. Its totient is φ = 463100736.

The previous prime is 1620853727. The next prime is 1620853777. The reversal of 1620853752 is 2573580261.

It is an interprime number because it is at equal distance from previous prime (1620853727) and next prime (1620853777).

It is a self number, because there is not a number n which added to its sum of digits gives 1620853752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687963 + ... + 690314.

Almost surely, 2^1620853752 is an apocalyptic number.

1620853752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620853752 is an abundant number, since it is smaller than the sum of its proper divisors (3092857008).

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

1620853752 is a wasteful number, since it uses less digits than its factorization.

1620853752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378300 (or 1378289 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 1620853752 is about 40259.8280175164. The cubic root of 1620853752 is about 1174.6665725424. Note that the first 3 decimals are identical.

The spelling of 1620853752 in words is "one billion, six hundred twenty million, eight hundred fifty-three thousand, seven hundred fifty-two".