71404140 has 24 divisors (see below), whose sum is σ = 199931760. Its totient is φ = 19041088.

The previous prime is 71404133. The next prime is 71404141. The reversal of 71404140 is 4140417.

It is not an unprimeable number, because it can be changed into a prime (71404141) 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, 594975 + ... + 595094.

It is an arithmetic number, because the mean of its divisors is an integer number (8330490).

Almost surely, 2^71404140 is an apocalyptic number.

It is an amenable number.

71404140 is an abundant number, since it is smaller than the sum of its proper divisors (128527620).

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

71404140 is a wasteful number, since it uses less digits than its factorization.

71404140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190081 (or 1190079 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 71404140 is about 8450.0970408629. The cubic root of 71404140 is about 414.8659556440.

Adding to 71404140 its reverse (4140417), we get a palindrome (75544557).

The spelling of 71404140 in words is "seventy-one million, four hundred four thousand, one hundred forty".