49778365 has 24 divisors (see below), whose sum is σ = 74836440. Its totient is φ = 31506048.

The previous prime is 49778341. The next prime is 49778383. The reversal of 49778365 is 56387794.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11573604 + 38204761 = 3402^2 + 6181^2 .

It is not a de Polignac number, because 49778365 - 2⁷ = 49778237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4630 + ... + 10999.

It is an arithmetic number, because the mean of its divisors is an integer number (3118185).

Almost surely, 2^49778365 is an apocalyptic number.

It is an amenable number.

49778365 is a deficient number, since it is larger than the sum of its proper divisors (25058075).

49778365 is a wasteful number, since it uses less digits than its factorization.

49778365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15661 (or 15654 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The square root of 49778365 is about 7055.3784448462. The cubic root of 49778365 is about 367.8580033644.

The spelling of 49778365 in words is "forty-nine million, seven hundred seventy-eight thousand, three hundred sixty-five".