2539743890 has 8 divisors (see below), whose sum is σ = 4571539020. Its totient is φ = 1015897552.

The previous prime is 2539743859. The next prime is 2539743901. The reversal of 2539743890 is 983479352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2535827449 + 3916441 = 50357^2 + 1979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126987185 + ... + 126987204.

Almost surely, 2^2539743890 is an apocalyptic number.

2539743890 is a deficient number, since it is larger than the sum of its proper divisors (2031795130).

2539743890 is a wasteful number, since it uses less digits than its factorization.

2539743890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253974396.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 2539743890 is about 50395.8717555317. The cubic root of 2539743890 is about 1364.3631301128.

The spelling of 2539743890 in words is "two billion, five hundred thirty-nine million, seven hundred forty-three thousand, eight hundred ninety".