147391640 has 64 divisors (see below), whose sum is σ = 363065760. Its totient is φ = 53406720.

The previous prime is 147391631. The next prime is 147391681. The reversal of 147391640 is 46193741.

147391640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 147391640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200714 + ... + 201446.

Almost surely, 2^147391640 is an apocalyptic number.

147391640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 147391640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181532880).

147391640 is an abundant number, since it is smaller than the sum of its proper divisors (215674120).

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

147391640 is a wasteful number, since it uses less digits than its factorization.

147391640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 147391640 is about 12140.4958712567. The cubic root of 147391640 is about 528.2314851980.

The spelling of 147391640 in words is "one hundred forty-seven million, three hundred ninety-one thousand, six hundred forty".