1620066250 has 80 divisors (see below), whose sum is σ = 3370546080. Its totient is φ = 578840000.

The previous prime is 1620066113. The next prime is 1620066263. The reversal of 1620066250 is 526600261.

It is a super-2 number, since 2×1620066250² = 5249229308778125000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 810252 + ... + 812248.

It is an arithmetic number, because the mean of its divisors is an integer number (42131826).

Almost surely, 2^1620066250 is an apocalyptic number.

1620066250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620066250 is an abundant number, since it is smaller than the sum of its proper divisors (1750479830).

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

1620066250 is a wasteful number, since it uses less digits than its factorization.

1620066250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1620066250 is about 40250.0465838240. The cubic root of 1620066250 is about 1174.4763020078.

The spelling of 1620066250 in words is "one billion, six hundred twenty million, sixty-six thousand, two hundred fifty".