46778889 has 4 divisors (see below), whose sum is σ = 62371856. Its totient is φ = 31185924.

The previous prime is 46778873. The next prime is 46778891. The reversal of 46778889 is 98887764.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 46778889 - 2⁴ = 46778873 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (46778819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7796479 + ... + 7796484.

It is an arithmetic number, because the mean of its divisors is an integer number (15592964).

Almost surely, 2^46778889 is an apocalyptic number.

It is an amenable number.

46778889 is a deficient number, since it is larger than the sum of its proper divisors (15592967).

46778889 is a wasteful number, since it uses less digits than its factorization.

46778889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15592966.

The product of its digits is 5419008, while the sum is 57.

The square root of 46778889 is about 6839.5094122313. The cubic root of 46778889 is about 360.3157954311.

The spelling of 46778889 in words is "forty-six million, seven hundred seventy-eight thousand, eight hundred eighty-nine".