70731636 has 12 divisors (see below), whose sum is σ = 165040512. Its totient is φ = 23577208.

The previous prime is 70731599. The next prime is 70731637. The reversal of 70731636 is 63613707.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 70731597 and 70731606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70731637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2947140 + ... + 2947163.

It is an arithmetic number, because the mean of its divisors is an integer number (13753376).

Almost surely, 2^70731636 is an apocalyptic number.

It is an amenable number.

70731636 is an abundant number, since it is smaller than the sum of its proper divisors (94308876).

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

70731636 is a wasteful number, since it uses less digits than its factorization.

70731636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894310 (or 5894308 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 70731636 is about 8410.2102232941. The cubic root of 70731636 is about 413.5594043090.

The spelling of 70731636 in words is "seventy million, seven hundred thirty-one thousand, six hundred thirty-six".