70471640 has 32 divisors (see below), whose sum is σ = 158896080. Its totient is φ = 28129152.

The previous prime is 70471633. The next prime is 70471657. The reversal of 70471640 is 4617407.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20699 + ... + 23861.

Almost surely, 2^70471640 is an apocalyptic number.

It is an amenable number.

70471640 is an abundant number, since it is smaller than the sum of its proper divisors (88424440).

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

70471640 is a wasteful number, since it uses less digits than its factorization.

70471640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731 (or 3727 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 70471640 is about 8394.7388285759. The cubic root of 70471640 is about 413.0520603428.

The spelling of 70471640 in words is "seventy million, four hundred seventy-one thousand, six hundred forty".