46780821 has 40 divisors (see below), whose sum is σ = 75506904. Its totient is φ = 28753920.

The previous prime is 46780817. The next prime is 46780823. The reversal of 46780821 is 12808764.

46780821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 28196100 + 18584721 = 5310^2 + 4311^2 .

It is not a de Polignac number, because 46780821 - 2² = 46780817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46780823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 72661 + ... + 73301.

Almost surely, 2^46780821 is an apocalyptic number.

It is an amenable number.

46780821 is a deficient number, since it is larger than the sum of its proper divisors (28726083).

46780821 is a wasteful number, since it uses less digits than its factorization.

46780821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 46780821 is about 6839.6506489732. The cubic root of 46780821 is about 360.3207557921.

The spelling of 46780821 in words is "forty-six million, seven hundred eighty thousand, eight hundred twenty-one".