216040492 has 6 divisors (see below), whose sum is σ = 378070868. Its totient is φ = 108020244.

The previous prime is 216040483. The next prime is 216040493. The reversal of 216040492 is 294040612.

It is a self number, because there is not a number n which added to its sum of digits gives 216040492.

It is not an unprimeable number, because it can be changed into a prime (216040493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27005058 + ... + 27005065.

Almost surely, 2^216040492 is an apocalyptic number.

It is an amenable number.

216040492 is a deficient number, since it is larger than the sum of its proper divisors (162030376).

216040492 is a wasteful number, since it uses less digits than its factorization.

216040492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54010127 (or 54010125 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 216040492 is about 14698.3159579593. The cubic root of 216040492 is about 600.0374902500.

The spelling of 216040492 in words is "two hundred sixteen million, forty thousand, four hundred ninety-two".