2539247078 has 4 divisors (see below), whose sum is σ = 3808870620. Its totient is φ = 1269623538.

The previous prime is 2539247071. The next prime is 2539247101. The reversal of 2539247078 is 8707429352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539247071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634811768 + ... + 634811771.

It is an arithmetic number, because the mean of its divisors is an integer number (952217655).

Almost surely, 2^2539247078 is an apocalyptic number.

2539247078 is a deficient number, since it is larger than the sum of its proper divisors (1269623542).

2539247078 is a wasteful number, since it uses less digits than its factorization.

2539247078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269623541.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 2539247078 is about 50390.9424202406. The cubic root of 2539247078 is about 1364.2741610136.

The spelling of 2539247078 in words is "two billion, five hundred thirty-nine million, two hundred forty-seven thousand, seventy-eight".