139026390 has 64 divisors (see below), whose sum is σ = 344736000. Its totient is φ = 35856000.

The previous prime is 139026359. The next prime is 139026403. The reversal of 139026390 is 93620931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278361 + ... + 278859.

It is an arithmetic number, because the mean of its divisors is an integer number (5386500).

Almost surely, 2^139026390 is an apocalyptic number.

139026390 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 139026390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172368000).

139026390 is an abundant number, since it is smaller than the sum of its proper divisors (205709610).

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

139026390 is a wasteful number, since it uses less digits than its factorization.

139026390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 139026390 is about 11790.9452547283. The cubic root of 139026390 is about 518.0429271283.

The spelling of 139026390 in words is "one hundred thirty-nine million, twenty-six thousand, three hundred ninety".