48787781 has 6 divisors (see below), whose sum is σ = 56753190. Its totient is φ = 41818056.

The previous prime is 48787771. The next prime is 48787811. The reversal of 48787781 is 18778784.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45346756 + 3441025 = 6734^2 + 1855^2 .

It is not a de Polignac number, because 48787781 - 2¹⁴ = 48771397 is a prime.

It is a super-2 number, since 2×48787781² = 4760495149807922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48787771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 497786 + ... + 497883.

It is an arithmetic number, because the mean of its divisors is an integer number (9458865).

Almost surely, 2^48787781 is an apocalyptic number.

It is an amenable number.

48787781 is a deficient number, since it is larger than the sum of its proper divisors (7965409).

48787781 is an equidigital number, since it uses as much as digits as its factorization.

48787781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995683 (or 995676 counting only the distinct ones).

The product of its digits is 702464, while the sum is 50.

The square root of 48787781 is about 6984.8250514956. The cubic root of 48787781 is about 365.4015247315.

The spelling of 48787781 in words is "forty-eight million, seven hundred eighty-seven thousand, seven hundred eighty-one".