78284898 has 72 divisors (see below), whose sum is σ = 183186900. Its totient is φ = 24153600.

The previous prime is 78284879. The next prime is 78284929. The reversal of 78284898 is 89848287.

It can be written as a sum of positive squares in 6 ways, for example, as 65561409 + 12723489 = 8097^2 + 3567^2 .

It is a super-2 number, since 2×78284898² = 12257050509740808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 525328 + ... + 525476.

Almost surely, 2^78284898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78284898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91593450).

78284898 is an abundant number, since it is smaller than the sum of its proper divisors (104902002).

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

78284898 is a wasteful number, since it uses less digits than its factorization.

78284898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 272 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 78284898 is about 8847.8753381815. The cubic root of 78284898 is about 427.7854377719.

The spelling of 78284898 in words is "seventy-eight million, two hundred eighty-four thousand, eight hundred ninety-eight".