51889320 has 192 divisors, whose sum is σ = 196560000. Its totient is φ = 11625984.

The previous prime is 51889303. The next prime is 51889337. The reversal of 51889320 is 2398815.

It is an interprime number because it is at equal distance from previous prime (51889303) and next prime (51889337).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148506 + ... + 148854.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^51889320 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 51889320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98280000).

51889320 is an abundant number, since it is smaller than the sum of its proper divisors (144670680).

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

51889320 is a wasteful number, since it uses less digits than its factorization.

51889320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 51889320 is about 7203.4241857605. The cubic root of 51889320 is about 372.9861106938.

The spelling of 51889320 in words is "fifty-one million, eight hundred eighty-nine thousand, three hundred twenty".