18878070 has 64 divisors (see below), whose sum is σ = 47775744. Its totient is φ = 4767360.

The previous prime is 18878063. The next prime is 18878071. The reversal of 18878070 is 7087881.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18878071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49099 + ... + 49481.

It is an arithmetic number, because the mean of its divisors is an integer number (746496).

Almost surely, 2^18878070 is an apocalyptic number.

18878070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18878070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23887872).

18878070 is an abundant number, since it is smaller than the sum of its proper divisors (28897674).

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

18878070 is a wasteful number, since it uses less digits than its factorization.

18878070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 18878070 is about 4344.8901021775. The cubic root of 18878070 is about 266.2681355982.

The spelling of 18878070 in words is "eighteen million, eight hundred seventy-eight thousand, seventy".