71649760 has 288 divisors, whose sum is σ = 229249440. Its totient is φ = 20901888.

The previous prime is 71649757. The next prime is 71649763. The reversal of 71649760 is 6794617.

71649760 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (71649757) and next prime (71649763).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71649763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1936462 + ... + 1936498.

It is an arithmetic number, because the mean of its divisors is an integer number (796005).

Almost surely, 2^71649760 is an apocalyptic number.

71649760 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71649760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114624720).

71649760 is an abundant number, since it is smaller than the sum of its proper divisors (157599680).

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

71649760 is a wasteful number, since it uses less digits than its factorization.

71649760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 71649760 is about 8464.6181248772. The cubic root of 71649760 is about 415.3411043728.

The spelling of 71649760 in words is "seventy-one million, six hundred forty-nine thousand, seven hundred sixty".