147705720 has 32 divisors (see below), whose sum is σ = 443117520. Its totient is φ = 39388160.

The previous prime is 147705703. The next prime is 147705737. The reversal of 147705720 is 27507741.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (147705703) and next prime (147705737).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 615321 + ... + 615560.

Almost surely, 2^147705720 is an apocalyptic number.

147705720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147705720 is an abundant number, since it is smaller than the sum of its proper divisors (295411800).

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

147705720 is a wasteful number, since it uses less digits than its factorization.

147705720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230895 (or 1230891 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 147705720 is about 12153.4242088393. The cubic root of 147705720 is about 528.6064255933.

The spelling of 147705720 in words is "one hundred forty-seven million, seven hundred five thousand, seven hundred twenty".