189878828 has 6 divisors (see below), whose sum is σ = 332287956. Its totient is φ = 94939412.

The previous prime is 189878809. The next prime is 189878891. The reversal of 189878828 is 828878981.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23734850 + ... + 23734857.

It is an arithmetic number, because the mean of its divisors is an integer number (55381326).

Almost surely, 2^189878828 is an apocalyptic number.

It is an amenable number.

189878828 is a deficient number, since it is larger than the sum of its proper divisors (142409128).

189878828 is a wasteful number, since it uses less digits than its factorization.

189878828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47469711 (or 47469709 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 59.

The square root of 189878828 is about 13779.6526806738. The cubic root of 189878828 is about 574.7674704391.

The spelling of 189878828 in words is "one hundred eighty-nine million, eight hundred seventy-eight thousand, eight hundred twenty-eight".