148639878 has 48 divisors (see below), whose sum is σ = 337077936. Its totient is φ = 47286720.

The previous prime is 148639847. The next prime is 148639889. The reversal of 148639878 is 878936841.

148639878 is a `hidden beast` number, since 1 + 486 + 3 + 98 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33193 + ... + 37403.

It is an arithmetic number, because the mean of its divisors is an integer number (7022457).

Almost surely, 2^148639878 is an apocalyptic number.

148639878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 148639878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168538968).

148639878 is an abundant number, since it is smaller than the sum of its proper divisors (188438058).

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

148639878 is a wasteful number, since it uses less digits than its factorization.

148639878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309 (or 4306 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 148639878 is about 12191.7955199388. The cubic root of 148639878 is about 529.7184668298.

The spelling of 148639878 in words is "one hundred forty-eight million, six hundred thirty-nine thousand, eight hundred seventy-eight".