216460538 has 48 divisors (see below), whose sum is σ = 399193344. Its totient is φ = 87635520.

The previous prime is 216460529. The next prime is 216460561. The reversal of 216460538 is 835064612.

It is a super-2 number, since 2×216460538² = 93710329022498888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216460498 and 216460507.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129806 + ... + 131462.

It is an arithmetic number, because the mean of its divisors is an integer number (8316528).

Almost surely, 2^216460538 is an apocalyptic number.

216460538 is a deficient number, since it is larger than the sum of its proper divisors (182732806).

216460538 is a wasteful number, since it uses less digits than its factorization.

216460538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 216460538 is about 14712.5979351031. The cubic root of 216460538 is about 600.4261213701.

The spelling of 216460538 in words is "two hundred sixteen million, four hundred sixty thousand, five hundred thirty-eight".