78100998 has 16 divisors (see below), whose sum is σ = 156365616. Its totient is φ = 26006400.

The previous prime is 78100993. The next prime is 78100999. The reversal of 78100998 is 89900187.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78100993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103 + ... + 12498.

It is an arithmetic number, because the mean of its divisors is an integer number (9772851).

Almost surely, 2^78100998 is an apocalyptic number.

78100998 is an abundant number, since it is smaller than the sum of its proper divisors (78264618).

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

78100998 is a wasteful number, since it uses less digits than its factorization.

78100998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 78100998 is about 8837.4769023743. The cubic root of 78100998 is about 427.4502031529.

The spelling of 78100998 in words is "seventy-eight million, one hundred thousand, nine hundred ninety-eight".