139893390 has 384 divisors, whose sum is σ = 503193600. Its totient is φ = 26127360.

The previous prime is 139893389. The next prime is 139893401. The reversal of 139893390 is 93398931.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 191 ways as a sum of consecutive naturals, for example, 4512675 + ... + 4512705.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^139893390 is an apocalyptic number.

139893390 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 139893390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251596800).

139893390 is an abundant number, since it is smaller than the sum of its proper divisors (363300210).

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

139893390 is a wasteful number, since it uses less digits than its factorization.

139893390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 139893390 is about 11827.6536134603. The cubic root of 139893390 is about 519.1175739064.

The spelling of 139893390 in words is "one hundred thirty-nine million, eight hundred ninety-three thousand, three hundred ninety".