139425678 has 192 divisors, whose sum is σ = 393984000. Its totient is φ = 36324288.

The previous prime is 139425677. The next prime is 139425683. The reversal of 139425678 is 876524931.

139425678 is a `hidden beast` number, since 1 + 394 + 256 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139425677) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1764843 + ... + 1764921.

It is an arithmetic number, because the mean of its divisors is an integer number (2052000).

Almost surely, 2^139425678 is an apocalyptic number.

139425678 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 139425678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196992000).

139425678 is an abundant number, since it is smaller than the sum of its proper divisors (254558322).

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

139425678 is a wasteful number, since it uses less digits than its factorization.

139425678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 143 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 139425678 is about 11807.8650906927. The cubic root of 139425678 is about 518.5383980835.

It can be divided in two parts, 1394 and 25678, that added together give a palindrome (27072).

The spelling of 139425678 in words is "one hundred thirty-nine million, four hundred twenty-five thousand, six hundred seventy-eight".