139426400 has 72 divisors (see below), whose sum is σ = 342009360. Its totient is φ = 55503360.

The previous prime is 139426379. The next prime is 139426429. The reversal of 139426400 is 4624931.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 317381 + ... + 317819.

It is an arithmetic number, because the mean of its divisors is an integer number (4750130).

Almost surely, 2^139426400 is an apocalyptic number.

139426400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139426400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171004680).

139426400 is an abundant number, since it is smaller than the sum of its proper divisors (202582960).

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

139426400 is a wasteful number, since it uses less digits than its factorization.

139426400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 843 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 139426400 is about 11807.8956634957. The cubic root of 139426400 is about 518.5392931460.

The spelling of 139426400 in words is "one hundred thirty-nine million, four hundred twenty-six thousand, four hundred".