139690044 has 36 divisors (see below), whose sum is σ = 380268616. Its totient is φ = 42981408.

The previous prime is 139690043. The next prime is 139690049. The reversal of 139690044 is 440096931.

139690044 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

139690044 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 139689990 and 139690008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139690043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148774 + ... + 149709.

Almost surely, 2^139690044 is an apocalyptic number.

It is an amenable number.

139690044 is an abundant number, since it is smaller than the sum of its proper divisors (240578572).

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

139690044 is a wasteful number, since it uses less digits than its factorization.

139690044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298506 (or 298501 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 139690044 is about 11819.0542768870. The cubic root of 139690044 is about 518.8659259185.

The spelling of 139690044 in words is "one hundred thirty-nine million, six hundred ninety thousand, forty-four".