71233040 has 40 divisors (see below), whose sum is σ = 170965248. Its totient is φ = 27573120.

The previous prime is 71233039. The next prime is 71233051. The reversal of 71233040 is 4033217.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11882 + ... + 16841.

Almost surely, 2^71233040 is an apocalyptic number.

It is an amenable number.

71233040 is an abundant number, since it is smaller than the sum of its proper divisors (99732208).

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

71233040 is a wasteful number, since it uses less digits than its factorization.

71233040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28767 (or 28761 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 71233040 is about 8439.9668245793. The cubic root of 71233040 is about 414.5343206342.

Adding to 71233040 its reverse (4033217), we get a palindrome (75266257).

The spelling of 71233040 in words is "seventy-one million, two hundred thirty-three thousand, forty".