78998136 has 32 divisors (see below), whose sum is σ = 225709440. Its totient is φ = 22570848.

The previous prime is 78998131. The next prime is 78998141. The reversal of 78998136 is 63189987.

It is an interprime number because it is at equal distance from previous prime (78998131) and next prime (78998141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78998131) 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, 234946 + ... + 235281.

It is an arithmetic number, because the mean of its divisors is an integer number (7053420).

Almost surely, 2^78998136 is an apocalyptic number.

It is an amenable number.

78998136 is an abundant number, since it is smaller than the sum of its proper divisors (146711304).

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

78998136 is a wasteful number, since it uses less digits than its factorization.

78998136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470243 (or 470239 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 78998136 is about 8888.0895585047. The cubic root of 78998136 is about 429.0806679391.

The spelling of 78998136 in words is "seventy-eight million, nine hundred ninety-eight thousand, one hundred thirty-six".