139694420 has 12 divisors (see below), whose sum is σ = 293358324. Its totient is φ = 55877760.

The previous prime is 139694411. The next prime is 139694431. The reversal of 139694420 is 24496931.

139694420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59197636 + 80496784 = 7694^2 + 8972^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3492341 + ... + 3492380.

It is an arithmetic number, because the mean of its divisors is an integer number (24446527).

Almost surely, 2^139694420 is an apocalyptic number.

139694420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139694420 is an abundant number, since it is smaller than the sum of its proper divisors (153663904).

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

139694420 is a wasteful number, since it uses less digits than its factorization.

139694420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984730 (or 6984728 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 139694420 is about 11819.2394002321. The cubic root of 139694420 is about 518.8713439462.

The spelling of 139694420 in words is "one hundred thirty-nine million, six hundred ninety-four thousand, four hundred twenty".