48978511 has 4 divisors (see below), whose sum is σ = 49303024. Its totient is φ = 48654000.

The previous prime is 48978497. The next prime is 48978529. The reversal of 48978511 is 11587984.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48978511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48978551) 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, 162030 + ... + 162331.

It is an arithmetic number, because the mean of its divisors is an integer number (12325756).

Almost surely, 2^48978511 is an apocalyptic number.

48978511 is a deficient number, since it is larger than the sum of its proper divisors (324513).

48978511 is a wasteful number, since it uses less digits than its factorization.

48978511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324512.

The product of its digits is 80640, while the sum is 43.

The square root of 48978511 is about 6998.4649031055. The cubic root of 48978511 is about 365.8770701055.

The spelling of 48978511 in words is "forty-eight million, nine hundred seventy-eight thousand, five hundred eleven".