139239072 has 72 divisors (see below), whose sum is σ = 452533536. Its totient is φ = 39782016.

The previous prime is 139239071. The next prime is 139239091. The reversal of 139239072 is 270932931.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (139239071) 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 11 ways as a sum of consecutive naturals, for example, 32518 + ... + 36549.

It is an arithmetic number, because the mean of its divisors is an integer number (6285188).

Almost surely, 2^139239072 is an apocalyptic number.

139239072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139239072 is an abundant number, since it is smaller than the sum of its proper divisors (313294464).

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

139239072 is a wasteful number, since it uses less digits than its factorization.

139239072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69090 (or 69079 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 139239072 is about 11799.9606779006. The cubic root of 139239072 is about 518.3069591825.

The spelling of 139239072 in words is "one hundred thirty-nine million, two hundred thirty-nine thousand, seventy-two".