51674640 has 80 divisors (see below), whose sum is σ = 161448000. Its totient is φ = 13671936.

The previous prime is 51674639. The next prime is 51674641. The reversal of 51674640 is 4647615.

It is an interprime number because it is at equal distance from previous prime (51674639) and next prime (51674641).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51674641) 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 15 ways as a sum of consecutive naturals, for example, 32586 + ... + 34134.

It is an arithmetic number, because the mean of its divisors is an integer number (2018100).

Almost surely, 2^51674640 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 51674640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80724000).

51674640 is an abundant number, since it is smaller than the sum of its proper divisors (109773360).

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

51674640 is a wasteful number, since it uses less digits than its factorization.

51674640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 51674640 is about 7188.5074946055. The cubic root of 51674640 is about 372.4710185701.

The spelling of 51674640 in words is "fifty-one million, six hundred seventy-four thousand, six hundred forty".