71904740 has 24 divisors (see below), whose sum is σ = 158948160. Its totient is φ = 27247968.

The previous prime is 71904737. The next prime is 71904743. The reversal of 71904740 is 4740917.

It is an interprime number because it is at equal distance from previous prime (71904737) and next prime (71904743).

It is a junction number, because it is equal to n+sod(n) for n = 71904697 and 71904706.

It is not an unprimeable number, because it can be changed into a prime (71904743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94232 + ... + 94991.

It is an arithmetic number, because the mean of its divisors is an integer number (6622840).

Almost surely, 2^71904740 is an apocalyptic number.

It is an amenable number.

71904740 is an abundant number, since it is smaller than the sum of its proper divisors (87043420).

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

71904740 is a wasteful number, since it uses less digits than its factorization.

71904740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189251 (or 189249 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71904740 is about 8479.6662670178. Note that the first 3 decimals coincide. The cubic root of 71904740 is about 415.8332125395.

The spelling of 71904740 in words is "seventy-one million, nine hundred four thousand, seven hundred forty".