46781820 has 96 divisors (see below), whose sum is σ = 149163840. Its totient is φ = 12165120.

The previous prime is 46781783. The next prime is 46781837. The reversal of 46781820 is 2818764.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21084 + ... + 23196.

It is an arithmetic number, because the mean of its divisors is an integer number (1553790).

Almost surely, 2^46781820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 46781820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74581920).

46781820 is an abundant number, since it is smaller than the sum of its proper divisors (102382020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

46781820 is a wasteful number, since it uses less digits than its factorization.

46781820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172 (or 2164 counting only the distinct ones).

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

The square root of 46781820 is about 6839.7236786291. The cubic root of 46781820 is about 360.3233206457.

The spelling of 46781820 in words is "forty-six million, seven hundred eighty-one thousand, eight hundred twenty".