71625540 has 48 divisors (see below), whose sum is σ = 229203072. Its totient is φ = 16371456.

The previous prime is 71625503. The next prime is 71625551. The reversal of 71625540 is 4552617.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 71625498 and 71625507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84849 + ... + 85688.

It is an arithmetic number, because the mean of its divisors is an integer number (4775064).

Almost surely, 2^71625540 is an apocalyptic number.

71625540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71625540 is an abundant number, since it is smaller than the sum of its proper divisors (157577532).

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

71625540 is a wasteful number, since it uses less digits than its factorization.

71625540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170556 (or 170554 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 71625540 is about 8463.1873428396. The cubic root of 71625540 is about 415.2942993998.

The spelling of 71625540 in words is "seventy-one million, six hundred twenty-five thousand, five hundred forty".