139979880 has 256 divisors, whose sum is σ = 499046400. Its totient is φ = 34836480.

The previous prime is 139979867. The next prime is 139979881. The reversal of 139979880 is 88979931.

139979880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (139979881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1238704 + ... + 1238816.

It is an arithmetic number, because the mean of its divisors is an integer number (1949400).

Almost surely, 2^139979880 is an apocalyptic number.

139979880 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 139979880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249523200).

139979880 is an abundant number, since it is smaller than the sum of its proper divisors (359066520).

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

139979880 is a wasteful number, since it uses less digits than its factorization.

139979880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 139979880 is about 11831.3093104694. The cubic root of 139979880 is about 519.2245344740.

The spelling of 139979880 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, eight hundred eighty".