139645000 has 80 divisors (see below), whose sum is σ = 357073200. Its totient is φ = 50760000.

The previous prime is 139644991. The next prime is 139645007. The reversal of 139645000 is 546931.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 139645000.

It is not an unprimeable number, because it can be changed into a prime (139645007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53731 + ... + 56269.

It is an arithmetic number, because the mean of its divisors is an integer number (4463415).

Almost surely, 2^139645000 is an apocalyptic number.

139645000 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 139645000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178536600).

139645000 is an abundant number, since it is smaller than the sum of its proper divisors (217428200).

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

139645000 is a wasteful number, since it uses less digits than its factorization.

139645000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 139645000 is about 11817.1485562296. The cubic root of 139645000 is about 518.8101493132.

The spelling of 139645000 in words is "one hundred thirty-nine million, six hundred forty-five thousand".