139012398 has 48 divisors (see below), whose sum is σ = 362344320. Its totient is φ = 37626768.

The previous prime is 139012373. The next prime is 139012409. The reversal of 139012398 is 893210931.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26640 + ... + 31427.

It is an arithmetic number, because the mean of its divisors is an integer number (7548840).

Almost surely, 2^139012398 is an apocalyptic number.

139012398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139012398 is an abundant number, since it is smaller than the sum of its proper divisors (223331922).

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

139012398 is a wasteful number, since it uses less digits than its factorization.

139012398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58101 (or 58098 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 139012398 is about 11790.3519031452. The cubic root of 139012398 is about 518.0255474547.

The spelling of 139012398 in words is "one hundred thirty-nine million, twelve thousand, three hundred ninety-eight".