78298384 has 20 divisors (see below), whose sum is σ = 154567116. Its totient is φ = 38410112.

The previous prime is 78298357. The next prime is 78298433. The reversal of 78298384 is 48389287.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 55830784 = 4740^2 + 7472^2 .

It is a super-2 number, since 2×78298384² = 12261273874022912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45319 + ... + 47014.

Almost surely, 2^78298384 is an apocalyptic number.

It is an amenable number.

78298384 is a deficient number, since it is larger than the sum of its proper divisors (76268732).

78298384 is a wasteful number, since it uses less digits than its factorization.

78298384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92394 (or 92388 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 78298384 is about 8848.6374092286. The cubic root of 78298384 is about 427.8100009734.

The spelling of 78298384 in words is "seventy-eight million, two hundred ninety-eight thousand, three hundred eighty-four".