1239890072 has 16 divisors (see below), whose sum is σ = 2425872240. Its totient is φ = 592990816.

The previous prime is 1239890059. The next prime is 1239890077. The reversal of 1239890072 is 2700989321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239890077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369083 + ... + 3369450.

It is an arithmetic number, because the mean of its divisors is an integer number (151617015).

Almost surely, 2^1239890072 is an apocalyptic number.

It is an amenable number.

1239890072 is a deficient number, since it is larger than the sum of its proper divisors (1185982168).

1239890072 is a wasteful number, since it uses less digits than its factorization.

1239890072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738562 (or 6738558 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1239890072 is about 35212.0728160101. The cubic root of 1239890072 is about 1074.3053228127.

The spelling of 1239890072 in words is "one billion, two hundred thirty-nine million, eight hundred ninety thousand, seventy-two".