139742380 has 24 divisors (see below), whose sum is σ = 310722048. Its totient is φ = 52608768.

The previous prime is 139742357. The next prime is 139742381. The reversal of 139742380 is 83247931.

It is not an unprimeable number, because it can be changed into a prime (139742381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 205164 + ... + 205843.

It is an arithmetic number, because the mean of its divisors is an integer number (12946752).

Almost surely, 2^139742380 is an apocalyptic number.

139742380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139742380 is an abundant number, since it is smaller than the sum of its proper divisors (170979668).

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

139742380 is a wasteful number, since it uses less digits than its factorization.

139742380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411033 (or 411031 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 139742380 is about 11821.2681214834. The cubic root of 139742380 is about 518.9307169270.

The spelling of 139742380 in words is "one hundred thirty-nine million, seven hundred forty-two thousand, three hundred eighty".