147857994 has 64 divisors (see below), whose sum is σ = 345502080. Its totient is φ = 46811520.

The previous prime is 147857971. The next prime is 147858017. The reversal of 147857994 is 499758741.

It is an interprime number because it is at equal distance from previous prime (147857971) and next prime (147858017).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 147857994.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85054 + ... + 86774.

It is an arithmetic number, because the mean of its divisors is an integer number (5398470).

Almost surely, 2^147857994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 147857994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172751040).

147857994 is an abundant number, since it is smaller than the sum of its proper divisors (197644086).

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

147857994 is a wasteful number, since it uses less digits than its factorization.

147857994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1806 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 147857994 is about 12159.6872492676. The cubic root of 147857994 is about 528.7880149722.

The spelling of 147857994 in words is "one hundred forty-seven million, eight hundred fifty-seven thousand, nine hundred ninety-four".