215984379740 has 24 divisors (see below), whose sum is σ = 453779135712. Its totient is φ = 86353382720.

The previous prime is 215984379719. The next prime is 215984379749. The reversal of 215984379740 is 47973489512.

It is a self number, because there is not a number n which added to its sum of digits gives 215984379740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215984379749) 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, 2479184 + ... + 2564823.

It is an arithmetic number, because the mean of its divisors is an integer number (18907463988).

Almost surely, 2^215984379740 is an apocalyptic number.

215984379740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215984379740 is an abundant number, since it is smaller than the sum of its proper divisors (237794755972).

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

215984379740 is a wasteful number, since it uses less digits than its factorization.

215984379740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046157 (or 5046155 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 215984379740 in words is "two hundred fifteen billion, nine hundred eighty-four million, three hundred seventy-nine thousand, seven hundred forty".