84771428 has 24 divisors (see below), whose sum is σ = 169737792. Its totient is φ = 36288864.

The previous prime is 84771383. The next prime is 84771439. The reversal of 84771428 is 82417748.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47651 + ... + 49397.

It is an arithmetic number, because the mean of its divisors is an integer number (7072408).

Almost surely, 2^84771428 is an apocalyptic number.

It is an amenable number.

84771428 is an abundant number, since it is smaller than the sum of its proper divisors (84966364).

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

84771428 is a wasteful number, since it uses less digits than its factorization.

84771428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491 (or 3489 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 84771428 is about 9207.1400554135. The cubic root of 84771428 is about 439.2884988489.

The spelling of 84771428 in words is "eighty-four million, seven hundred seventy-one thousand, four hundred twenty-eight".