84978764 has 24 divisors (see below), whose sum is σ = 162415008. Its totient is φ = 38666880.

The previous prime is 84978763. The next prime is 84978779. The reversal of 84978764 is 46787948.

It is not an unprimeable number, because it can be changed into a prime (84978763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7817 + ... + 15200.

It is an arithmetic number, because the mean of its divisors is an integer number (6767292).

Almost surely, 2^84978764 is an apocalyptic number.

It is an amenable number.

84978764 is a deficient number, since it is larger than the sum of its proper divisors (77436244).

84978764 is a wasteful number, since it uses less digits than its factorization.

84978764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23105 (or 23103 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The square root of 84978764 is about 9218.3927015505. The cubic root of 84978764 is about 439.6463480583.

The spelling of 84978764 in words is "eighty-four million, nine hundred seventy-eight thousand, seven hundred sixty-four".