216420620 has 48 divisors (see below), whose sum is σ = 506338560. Its totient is φ = 77150976.

The previous prime is 216420577. The next prime is 216420647. The reversal of 216420620 is 26024612.

It is a super-2 number, since 2×216420620² = 93675769522368800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (10548720).

Almost surely, 2^216420620 is an apocalyptic number.

216420620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216420620 is an abundant number, since it is smaller than the sum of its proper divisors (289917940).

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

216420620 is a wasteful number, since it uses less digits than its factorization.

216420620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28754 (or 28752 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 216420620 is about 14711.2412800552. The cubic root of 216420620 is about 600.3892104338.

The spelling of 216420620 in words is "two hundred sixteen million, four hundred twenty thousand, six hundred twenty".