216989034940 has 24 divisors (see below), whose sum is σ = 455742447552. Its totient is φ = 86783142720.

The previous prime is 216989034931. The next prime is 216989034947. The reversal of 216989034940 is 49430989612.

It is a super-3 number, since 3×216989034940³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216989034947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636139 + ... + 915778.

It is an arithmetic number, because the mean of its divisors is an integer number (18989268648).

Almost surely, 2^216989034940 is an apocalyptic number.

216989034940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216989034940 is an abundant number, since it is smaller than the sum of its proper divisors (238753412612).

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

216989034940 is a wasteful number, since it uses less digits than its factorization.

216989034940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558917 (or 1558915 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 216989034940 in words is "two hundred sixteen billion, nine hundred eighty-nine million, thirty-four thousand, nine hundred forty".