201878442 has 24 divisors (see below), whose sum is σ = 446711616. Its totient is φ = 65860776.

The previous prime is 201878441. The next prime is 201878473. The reversal of 201878442 is 244878102.

201878442 is a `hidden beast` number, since 201 + 8 + 7 + 8 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 201878397 and 201878406.

It is not an unprimeable number, because it can be changed into a prime (201878441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118468 + ... + 120159.

It is an arithmetic number, because the mean of its divisors is an integer number (18612984).

Almost surely, 2^201878442 is an apocalyptic number.

201878442 is an abundant number, since it is smaller than the sum of its proper divisors (244833174).

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

201878442 is a wasteful number, since it uses less digits than its factorization.

201878442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238682 (or 238679 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 201878442 is about 14208.3933644871. The cubic root of 201878442 is about 586.6287113157.

The spelling of 201878442 in words is "two hundred one million, eight hundred seventy-eight thousand, four hundred forty-two".