6139406628 has 18 divisors (see below), whose sum is σ = 15519055734. Its totient is φ = 2046468864.

The previous prime is 6139406599. The next prime is 6139406699. The reversal of 6139406628 is 8266049316.

6139406628 is a `hidden beast` number, since 6 + 13 + 9 + 4 + 0 + 6 + 628 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6137468964 + 1937664 = 78342^2 + 1392^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85269501 + ... + 85269572.

It is an arithmetic number, because the mean of its divisors is an integer number (862169763).

Almost surely, 2^6139406628 is an apocalyptic number.

It is an amenable number.

6139406628 is an abundant number, since it is smaller than the sum of its proper divisors (9379649106).

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

6139406628 is a wasteful number, since it uses less digits than its factorization.

6139406628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170539083 (or 170539078 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 6139406628 is about 78354.3657239340. The cubic root of 6139406628 is about 1831.0862421438.

The spelling of 6139406628 in words is "six billion, one hundred thirty-nine million, four hundred six thousand, six hundred twenty-eight".