84428964 has 18 divisors (see below), whose sum is σ = 213417750. Its totient is φ = 28142976.

The previous prime is 84428957. The next prime is 84428969. The reversal of 84428964 is 46982448.

It can be written as a sum of positive squares in only one way, i.e., 80460900 + 3968064 = 8970^2 + 1992^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×84428964² = 14256499924226592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84428969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1172589 + ... + 1172660.

Almost surely, 2^84428964 is an apocalyptic number.

It is an amenable number.

84428964 is an abundant number, since it is smaller than the sum of its proper divisors (128988786).

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

84428964 is a wasteful number, since it uses less digits than its factorization.

84428964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345259 (or 2345254 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 84428964 is about 9188.5234940114. The cubic root of 84428964 is about 438.6961469929.

The spelling of 84428964 in words is "eighty-four million, four hundred twenty-eight thousand, nine hundred sixty-four".