71503940 has 24 divisors (see below), whose sum is σ = 150436440. Its totient is φ = 28548608.

The previous prime is 71503933. The next prime is 71503951. The reversal of 71503940 is 4930517.

It can be written as a sum of positive squares in 4 ways, for example, as 25725184 + 45778756 = 5072^2 + 6766^2 .

It is a super-2 number, since 2×71503940² = 10225626871047200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8846 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (6268185).

Almost surely, 2^71503940 is an apocalyptic number.

It is an amenable number.

71503940 is an abundant number, since it is smaller than the sum of its proper divisors (78932500).

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

71503940 is a wasteful number, since it uses less digits than its factorization.

71503940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631 (or 6629 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 71503940 is about 8456.0002365184. Note that the first 3 decimals coincide. The cubic root of 71503940 is about 415.0591486797.

The spelling of 71503940 in words is "seventy-one million, five hundred three thousand, nine hundred forty".