48778787 has 4 divisors (see below), whose sum is σ = 49396320. Its totient is φ = 48161256.

The previous prime is 48778777. The next prime is 48778789. The reversal of 48778787 is 78787784.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 48778787 - 2⁴ = 48778771 is a prime.

It is a super-2 number, since 2×48778787² = 4758740122382738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48778789) 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, 308648 + ... + 308805.

It is an arithmetic number, because the mean of its divisors is an integer number (12349080).

Almost surely, 2^48778787 is an apocalyptic number.

48778787 is a deficient number, since it is larger than the sum of its proper divisors (617533).

48778787 is an equidigital number, since it uses as much as digits as its factorization.

48778787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617532.

The product of its digits is 4917248, while the sum is 56.

The square root of 48778787 is about 6984.1811975349. The cubic root of 48778787 is about 365.3790694963.

The spelling of 48778787 in words is "forty-eight million, seven hundred seventy-eight thousand, seven hundred eighty-seven".