139022730 has 192 divisors, whose sum is σ = 467970048. Its totient is φ = 28848960.

The previous prime is 139022713. The next prime is 139022731. The reversal of 139022730 is 37220931.

139022730 is a `hidden beast` number, since 1 + 390 + 2 + 273 + 0 = 666.

It is a super-3 number, since 3×139022730³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 139022694 and 139022703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139022731) 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, 186739 + ... + 187481.

It is an arithmetic number, because the mean of its divisors is an integer number (2437344).

Almost surely, 2^139022730 is an apocalyptic number.

139022730 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 139022730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233985024).

139022730 is an abundant number, since it is smaller than the sum of its proper divisors (328947318).

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

139022730 is a wasteful number, since it uses less digits than its factorization.

139022730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 139022730 is about 11790.7900498652. The cubic root of 139022730 is about 518.0383810999.

The spelling of 139022730 in words is "one hundred thirty-nine million, twenty-two thousand, seven hundred thirty".