139057730 has 16 divisors (see below), whose sum is σ = 286061760. Its totient is φ = 47676912.

The previous prime is 139057717. The next prime is 139057759. The reversal of 139057730 is 37750931.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

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, 993200 + ... + 993339.

It is an arithmetic number, because the mean of its divisors is an integer number (17878860).

Almost surely, 2^139057730 is an apocalyptic number.

139057730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139057730 is an abundant number, since it is smaller than the sum of its proper divisors (147004030).

139057730 is a wasteful number, since it uses less digits than its factorization.

139057730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986553.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 139057730 is about 11792.2741657409. The cubic root of 139057730 is about 518.0818507828.

The spelling of 139057730 in words is "one hundred thirty-nine million, fifty-seven thousand, seven hundred thirty".